diff --git a/BTCPayServer/Views/Wallets/WalletSendVault.cshtml b/BTCPayServer/Views/Wallets/WalletSendVault.cshtml
index 21b94c46d..27536df33 100644
--- a/BTCPayServer/Views/Wallets/WalletSendVault.cshtml
+++ b/BTCPayServer/Views/Wallets/WalletSendVault.cshtml
@@ -18,7 +18,7 @@
             <input type="hidden" asp-for="WebsocketPath" />
         </form>
         <div id="vaultPlaceholder"></div>
-        <button id="vault-confirm" class="btn btn-primary" style="display:none;" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"></button>
+        <button id="vault-confirm" class="btn btn-primary" style="display:none;"></button>
     </div>
 </div>
 
diff --git a/BTCPayServer/wwwroot/vendor/popper/popper.js b/BTCPayServer/wwwroot/vendor/popper/popper.js
index c46aa9f74..939091fce 100644
--- a/BTCPayServer/wwwroot/vendor/popper/popper.js
+++ b/BTCPayServer/wwwroot/vendor/popper/popper.js
@@ -1,6 +1,6 @@
 /**!
  * @fileOverview Kickass library to create and place poppers near their reference elements.
- * @version 1.11.1
+ * @version 1.16.0
  * @license
  * Copyright (c) 2016 Federico Zivolo and contributors
  *
@@ -29,52 +29,29 @@
 }(this, (function () {
     'use strict';
 
-    var nativeHints = ['native code', '[object MutationObserverConstructor]'];
+    var isBrowser = typeof window !== 'undefined' && typeof document !== 'undefined' && typeof navigator !== 'undefined';
 
-    /**
-     * Determine if a function is implemented natively (as opposed to a polyfill).
-     * @method
-     * @memberof Popper.Utils
-     * @argument {Function | undefined} fn the function to check
-     * @returns {Boolean}
-     */
-    var isNative = (function (fn) {
-        return nativeHints.some(function (hint) {
-            return (fn || '').toString().indexOf(hint) > -1;
-        });
-    });
-
-    var isBrowser = typeof window !== 'undefined';
-    var longerTimeoutBrowsers = ['Edge', 'Trident', 'Firefox'];
-    var timeoutDuration = 0;
-    for (var i = 0; i < longerTimeoutBrowsers.length; i += 1) {
-        if (isBrowser && navigator.userAgent.indexOf(longerTimeoutBrowsers[i]) >= 0) {
-            timeoutDuration = 1;
-            break;
+    var timeoutDuration = function () {
+        var longerTimeoutBrowsers = ['Edge', 'Trident', 'Firefox'];
+        for (var i = 0; i < longerTimeoutBrowsers.length; i += 1) {
+            if (isBrowser && navigator.userAgent.indexOf(longerTimeoutBrowsers[i]) >= 0) {
+                return 1;
+            }
         }
-    }
+        return 0;
+    }();
 
     function microtaskDebounce(fn) {
-        var scheduled = false;
-        var i = 0;
-        var elem = document.createElement('span');
-
-        // MutationObserver provides a mechanism for scheduling microtasks, which
-        // are scheduled *before* the next task. This gives us a way to debounce
-        // a function but ensure it's called *before* the next paint.
-        var observer = new MutationObserver(function () {
-            fn();
-            scheduled = false;
-        });
-
-        observer.observe(elem, { attributes: true });
-
+        var called = false;
         return function () {
-            if (!scheduled) {
-                scheduled = true;
-                elem.setAttribute('x-index', i);
-                i = i + 1; // don't use compund (+=) because it doesn't get optimized in V8
+            if (called) {
+                return;
             }
+            called = true;
+            window.Promise.resolve().then(function () {
+                called = false;
+                fn();
+            });
         };
     }
 
@@ -91,11 +68,7 @@
         };
     }
 
-    // It's common for MutationObserver polyfills to be seen in the wild, however
-    // these rely on Mutation Events which only occur when an element is connected
-    // to the DOM. The algorithm used in this module does not use a connected element,
-    // and so we must ensure that a *native* MutationObserver is available.
-    var supportsNativeMutationObserver = isBrowser && isNative(window.MutationObserver);
+    var supportsMicroTasks = isBrowser && window.Promise;
 
     /**
     * Create a debounced version of a method, that's asynchronously deferred
@@ -106,7 +79,7 @@
     * @argument {Function} fn
     * @returns {Function}
     */
-    var debounce = supportsNativeMutationObserver ? microtaskDebounce : taskDebounce;
+    var debounce = supportsMicroTasks ? microtaskDebounce : taskDebounce;
 
     /**
      * Check if the given variable is a function
@@ -132,6 +105,7 @@
             return [];
         }
         // NOTE: 1 DOM access here
+        var window = element.ownerDocument.defaultView;
         var css = window.getComputedStyle(element, null);
         return property ? css[property] : css;
     }
@@ -159,8 +133,16 @@
      */
     function getScrollParent(element) {
         // Return body, `getScroll` will take care to get the correct `scrollTop` from it
-        if (!element || ['HTML', 'BODY', '#document'].indexOf(element.nodeName) !== -1) {
-            return window.document.body;
+        if (!element) {
+            return document.body;
+        }
+
+        switch (element.nodeName) {
+            case 'HTML':
+            case 'BODY':
+                return element.ownerDocument.body;
+            case '#document':
+                return element.body;
         }
 
         // Firefox want us to check `-x` and `-y` variations as well
@@ -170,13 +152,44 @@
             overflowX = _getStyleComputedProp.overflowX,
             overflowY = _getStyleComputedProp.overflowY;
 
-        if (/(auto|scroll)/.test(overflow + overflowY + overflowX)) {
+        if (/(auto|scroll|overlay)/.test(overflow + overflowY + overflowX)) {
             return element;
         }
 
         return getScrollParent(getParentNode(element));
     }
 
+    /**
+     * Returns the reference node of the reference object, or the reference object itself.
+     * @method
+     * @memberof Popper.Utils
+     * @param {Element|Object} reference - the reference element (the popper will be relative to this)
+     * @returns {Element} parent
+     */
+    function getReferenceNode(reference) {
+        return reference && reference.referenceNode ? reference.referenceNode : reference;
+    }
+
+    var isIE11 = isBrowser && !!(window.MSInputMethodContext && document.documentMode);
+    var isIE10 = isBrowser && /MSIE 10/.test(navigator.userAgent);
+
+    /**
+     * Determines if the browser is Internet Explorer
+     * @method
+     * @memberof Popper.Utils
+     * @param {Number} version to check
+     * @returns {Boolean} isIE
+     */
+    function isIE(version) {
+        if (version === 11) {
+            return isIE11;
+        }
+        if (version === 10) {
+            return isIE10;
+        }
+        return isIE11 || isIE10;
+    }
+
     /**
      * Returns the offset parent of the given element
      * @method
@@ -185,17 +198,28 @@
      * @returns {Element} offset parent
      */
     function getOffsetParent(element) {
+        if (!element) {
+            return document.documentElement;
+        }
+
+        var noOffsetParent = isIE(10) ? document.body : null;
+
         // NOTE: 1 DOM access here
-        var offsetParent = element && element.offsetParent;
+        var offsetParent = element.offsetParent || null;
+        // Skip hidden elements which don't have an offsetParent
+        while (offsetParent === noOffsetParent && element.nextElementSibling) {
+            offsetParent = (element = element.nextElementSibling).offsetParent;
+        }
+
         var nodeName = offsetParent && offsetParent.nodeName;
 
         if (!nodeName || nodeName === 'BODY' || nodeName === 'HTML') {
-            return window.document.documentElement;
+            return element ? element.ownerDocument.documentElement : document.documentElement;
         }
 
-        // .offsetParent will return the closest TD or TABLE in case
+        // .offsetParent will return the closest TH, TD or TABLE in case
         // no offsetParent is present, I hate this job...
-        if (['TD', 'TABLE'].indexOf(offsetParent.nodeName) !== -1 && getStyleComputedProperty(offsetParent, 'position') === 'static') {
+        if (['TH', 'TD', 'TABLE'].indexOf(offsetParent.nodeName) !== -1 && getStyleComputedProperty(offsetParent, 'position') === 'static') {
             return getOffsetParent(offsetParent);
         }
 
@@ -237,7 +261,7 @@
     function findCommonOffsetParent(element1, element2) {
         // This check is needed to avoid errors in case one of the elements isn't defined for any reason
         if (!element1 || !element1.nodeType || !element2 || !element2.nodeType) {
-            return window.document.documentElement;
+            return document.documentElement;
         }
 
         // Here we make sure to give as "start" the element that comes first in the DOM
@@ -285,8 +309,8 @@
         var nodeName = element.nodeName;
 
         if (nodeName === 'BODY' || nodeName === 'HTML') {
-            var html = window.document.documentElement;
-            var scrollingElement = window.document.scrollingElement || html;
+            var html = element.ownerDocument.documentElement;
+            var scrollingElement = element.ownerDocument.scrollingElement || html;
             return scrollingElement[upperSide];
         }
 
@@ -329,32 +353,17 @@
         var sideA = axis === 'x' ? 'Left' : 'Top';
         var sideB = sideA === 'Left' ? 'Right' : 'Bottom';
 
-        return +styles['border' + sideA + 'Width'].split('px')[0] + +styles['border' + sideB + 'Width'].split('px')[0];
+        return parseFloat(styles['border' + sideA + 'Width'], 10) + parseFloat(styles['border' + sideB + 'Width'], 10);
     }
 
-    /**
-     * Tells if you are running Internet Explorer 10
-     * @method
-     * @memberof Popper.Utils
-     * @returns {Boolean} isIE10
-     */
-    var isIE10 = undefined;
-
-    var isIE10$1 = function () {
-        if (isIE10 === undefined) {
-            isIE10 = navigator.appVersion.indexOf('MSIE 10') !== -1;
-        }
-        return isIE10;
-    };
-
     function getSize(axis, body, html, computedStyle) {
-        return Math.max(body['offset' + axis], html['client' + axis], html['offset' + axis], isIE10$1() ? html['offset' + axis] + computedStyle['margin' + (axis === 'Height' ? 'Top' : 'Left')] + computedStyle['margin' + (axis === 'Height' ? 'Bottom' : 'Right')] : 0);
+        return Math.max(body['offset' + axis], body['scroll' + axis], html['client' + axis], html['offset' + axis], html['scroll' + axis], isIE(10) ? parseInt(html['offset' + axis]) + parseInt(computedStyle['margin' + (axis === 'Height' ? 'Top' : 'Left')]) + parseInt(computedStyle['margin' + (axis === 'Height' ? 'Bottom' : 'Right')]) : 0);
     }
 
-    function getWindowSizes() {
-        var body = window.document.body;
-        var html = window.document.documentElement;
-        var computedStyle = isIE10$1() && window.getComputedStyle(html);
+    function getWindowSizes(document) {
+        var body = document.body;
+        var html = document.documentElement;
+        var computedStyle = isIE(10) && getComputedStyle(html);
 
         return {
             height: getSize('Height', body, html, computedStyle),
@@ -446,8 +455,8 @@
         // IE10 10 FIX: Please, don't ask, the element isn't
         // considered in DOM in some circumstances...
         // This isn't reproducible in IE10 compatibility mode of IE11
-        if (isIE10$1()) {
-            try {
+        try {
+            if (isIE(10)) {
                 rect = element.getBoundingClientRect();
                 var scrollTop = getScroll(element, 'top');
                 var scrollLeft = getScroll(element, 'left');
@@ -455,10 +464,10 @@
                 rect.left += scrollLeft;
                 rect.bottom += scrollTop;
                 rect.right += scrollLeft;
-            } catch (err) { }
-        } else {
-            rect = element.getBoundingClientRect();
-        }
+            } else {
+                rect = element.getBoundingClientRect();
+            }
+        } catch (e) { }
 
         var result = {
             left: rect.left,
@@ -468,9 +477,9 @@
         };
 
         // subtract scrollbar size from sizes
-        var sizes = element.nodeName === 'HTML' ? getWindowSizes() : {};
-        var width = sizes.width || element.clientWidth || result.right - result.left;
-        var height = sizes.height || element.clientHeight || result.bottom - result.top;
+        var sizes = element.nodeName === 'HTML' ? getWindowSizes(element.ownerDocument) : {};
+        var width = sizes.width || element.clientWidth || result.width;
+        var height = sizes.height || element.clientHeight || result.height;
 
         var horizScrollbar = element.offsetWidth - width;
         var vertScrollbar = element.offsetHeight - height;
@@ -490,16 +499,23 @@
     }
 
     function getOffsetRectRelativeToArbitraryNode(children, parent) {
-        var isIE10 = isIE10$1();
+        var fixedPosition = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
+
+        var isIE10 = isIE(10);
         var isHTML = parent.nodeName === 'HTML';
         var childrenRect = getBoundingClientRect(children);
         var parentRect = getBoundingClientRect(parent);
         var scrollParent = getScrollParent(children);
 
         var styles = getStyleComputedProperty(parent);
-        var borderTopWidth = +styles.borderTopWidth.split('px')[0];
-        var borderLeftWidth = +styles.borderLeftWidth.split('px')[0];
+        var borderTopWidth = parseFloat(styles.borderTopWidth, 10);
+        var borderLeftWidth = parseFloat(styles.borderLeftWidth, 10);
 
+        // In cases where the parent is fixed, we must ignore negative scroll in offset calc
+        if (fixedPosition && isHTML) {
+            parentRect.top = Math.max(parentRect.top, 0);
+            parentRect.left = Math.max(parentRect.left, 0);
+        }
         var offsets = getClientRect({
             top: childrenRect.top - parentRect.top - borderTopWidth,
             left: childrenRect.left - parentRect.left - borderLeftWidth,
@@ -514,8 +530,8 @@
         // differently when margins are applied to it. The margins are included in
         // the box of the documentElement, in the other cases not.
         if (!isIE10 && isHTML) {
-            var marginTop = +styles.marginTop.split('px')[0];
-            var marginLeft = +styles.marginLeft.split('px')[0];
+            var marginTop = parseFloat(styles.marginTop, 10);
+            var marginLeft = parseFloat(styles.marginLeft, 10);
 
             offsets.top -= borderTopWidth - marginTop;
             offsets.bottom -= borderTopWidth - marginTop;
@@ -527,7 +543,7 @@
             offsets.marginLeft = marginLeft;
         }
 
-        if (isIE10 ? parent.contains(scrollParent) : parent === scrollParent && scrollParent.nodeName !== 'BODY') {
+        if (isIE10 && !fixedPosition ? parent.contains(scrollParent) : parent === scrollParent && scrollParent.nodeName !== 'BODY') {
             offsets = includeScroll(offsets, parent);
         }
 
@@ -535,13 +551,15 @@
     }
 
     function getViewportOffsetRectRelativeToArtbitraryNode(element) {
-        var html = window.document.documentElement;
+        var excludeScroll = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
+
+        var html = element.ownerDocument.documentElement;
         var relativeOffset = getOffsetRectRelativeToArbitraryNode(element, html);
         var width = Math.max(html.clientWidth, window.innerWidth || 0);
         var height = Math.max(html.clientHeight, window.innerHeight || 0);
 
-        var scrollTop = getScroll(html);
-        var scrollLeft = getScroll(html, 'left');
+        var scrollTop = !excludeScroll ? getScroll(html) : 0;
+        var scrollLeft = !excludeScroll ? getScroll(html, 'left') : 0;
 
         var offset = {
             top: scrollTop - relativeOffset.top + relativeOffset.marginTop,
@@ -569,7 +587,31 @@
         if (getStyleComputedProperty(element, 'position') === 'fixed') {
             return true;
         }
-        return isFixed(getParentNode(element));
+        var parentNode = getParentNode(element);
+        if (!parentNode) {
+            return false;
+        }
+        return isFixed(parentNode);
+    }
+
+    /**
+     * Finds the first parent of an element that has a transformed property defined
+     * @method
+     * @memberof Popper.Utils
+     * @argument {Element} element
+     * @returns {Element} first transformed parent or documentElement
+     */
+
+    function getFixedPositionOffsetParent(element) {
+        // This check is needed to avoid errors in case one of the elements isn't defined for any reason
+        if (!element || !element.parentElement || isIE()) {
+            return document.documentElement;
+        }
+        var el = element.parentElement;
+        while (el && getStyleComputedProperty(el, 'transform') === 'none') {
+            el = el.parentElement;
+        }
+        return el || document.documentElement;
     }
 
     /**
@@ -580,35 +622,39 @@
      * @param {HTMLElement} reference
      * @param {number} padding
      * @param {HTMLElement} boundariesElement - Element used to define the boundaries
+     * @param {Boolean} fixedPosition - Is in fixed position mode
      * @returns {Object} Coordinates of the boundaries
      */
     function getBoundaries(popper, reference, padding, boundariesElement) {
+        var fixedPosition = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : false;
+
         // NOTE: 1 DOM access here
+
         var boundaries = { top: 0, left: 0 };
-        var offsetParent = findCommonOffsetParent(popper, reference);
+        var offsetParent = fixedPosition ? getFixedPositionOffsetParent(popper) : findCommonOffsetParent(popper, getReferenceNode(reference));
 
         // Handle viewport case
         if (boundariesElement === 'viewport') {
-            boundaries = getViewportOffsetRectRelativeToArtbitraryNode(offsetParent);
+            boundaries = getViewportOffsetRectRelativeToArtbitraryNode(offsetParent, fixedPosition);
         } else {
             // Handle other cases based on DOM element used as boundaries
             var boundariesNode = void 0;
             if (boundariesElement === 'scrollParent') {
-                boundariesNode = getScrollParent(getParentNode(popper));
+                boundariesNode = getScrollParent(getParentNode(reference));
                 if (boundariesNode.nodeName === 'BODY') {
-                    boundariesNode = window.document.documentElement;
+                    boundariesNode = popper.ownerDocument.documentElement;
                 }
             } else if (boundariesElement === 'window') {
-                boundariesNode = window.document.documentElement;
+                boundariesNode = popper.ownerDocument.documentElement;
             } else {
                 boundariesNode = boundariesElement;
             }
 
-            var offsets = getOffsetRectRelativeToArbitraryNode(boundariesNode, offsetParent);
+            var offsets = getOffsetRectRelativeToArbitraryNode(boundariesNode, offsetParent, fixedPosition);
 
             // In case of HTML, we need a different computation
             if (boundariesNode.nodeName === 'HTML' && !isFixed(offsetParent)) {
-                var _getWindowSizes = getWindowSizes(),
+                var _getWindowSizes = getWindowSizes(popper.ownerDocument),
                     height = _getWindowSizes.height,
                     width = _getWindowSizes.width;
 
@@ -623,10 +669,12 @@
         }
 
         // Add paddings
-        boundaries.left += padding;
-        boundaries.top += padding;
-        boundaries.right -= padding;
-        boundaries.bottom -= padding;
+        padding = padding || 0;
+        var isPaddingNumber = typeof padding === 'number';
+        boundaries.left += isPaddingNumber ? padding : padding.left || 0;
+        boundaries.top += isPaddingNumber ? padding : padding.top || 0;
+        boundaries.right -= isPaddingNumber ? padding : padding.right || 0;
+        boundaries.bottom -= isPaddingNumber ? padding : padding.bottom || 0;
 
         return boundaries;
     }
@@ -679,8 +727,8 @@
             return _extends({
                 key: key
             }, rects[key], {
-                    area: getArea(rects[key])
-                });
+                area: getArea(rects[key])
+            });
         }).sort(function (a, b) {
             return b.area - a.area;
         });
@@ -705,11 +753,14 @@
      * @param {Object} state
      * @param {Element} popper - the popper element
      * @param {Element} reference - the reference element (the popper will be relative to this)
+     * @param {Element} fixedPosition - is in fixed position mode
      * @returns {Object} An object containing the offsets which will be applied to the popper
      */
     function getReferenceOffsets(state, popper, reference) {
-        var commonOffsetParent = findCommonOffsetParent(popper, reference);
-        return getOffsetRectRelativeToArbitraryNode(reference, commonOffsetParent);
+        var fixedPosition = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;
+
+        var commonOffsetParent = fixedPosition ? getFixedPositionOffsetParent(popper) : findCommonOffsetParent(popper, getReferenceNode(reference));
+        return getOffsetRectRelativeToArbitraryNode(reference, commonOffsetParent, fixedPosition);
     }
 
     /**
@@ -720,9 +771,10 @@
      * @returns {Object} object containing width and height properties
      */
     function getOuterSizes(element) {
+        var window = element.ownerDocument.defaultView;
         var styles = window.getComputedStyle(element);
-        var x = parseFloat(styles.marginTop) + parseFloat(styles.marginBottom);
-        var y = parseFloat(styles.marginLeft) + parseFloat(styles.marginRight);
+        var x = parseFloat(styles.marginTop || 0) + parseFloat(styles.marginBottom || 0);
+        var y = parseFloat(styles.marginLeft || 0) + parseFloat(styles.marginRight || 0);
         var result = {
             width: element.offsetWidth + y,
             height: element.offsetHeight + x
@@ -840,10 +892,11 @@
         var modifiersToRun = ends === undefined ? modifiers : modifiers.slice(0, findIndex(modifiers, 'name', ends));
 
         modifiersToRun.forEach(function (modifier) {
-            if (modifier.function) {
+            if (modifier['function']) {
+                // eslint-disable-line dot-notation
                 console.warn('`modifier.function` is deprecated, use `modifier.fn`!');
             }
-            var fn = modifier.function || modifier.fn;
+            var fn = modifier['function'] || modifier.fn; // eslint-disable-line dot-notation
             if (modifier.enabled && isFunction(fn)) {
                 // Add properties to offsets to make them a complete clientRect object
                 // we do this before each modifier to make sure the previous one doesn't
@@ -874,13 +927,14 @@
         var data = {
             instance: this,
             styles: {},
+            arrowStyles: {},
             attributes: {},
             flipped: false,
             offsets: {}
         };
 
         // compute reference element offsets
-        data.offsets.reference = getReferenceOffsets(this.state, this.popper, this.reference);
+        data.offsets.reference = getReferenceOffsets(this.state, this.popper, this.reference, this.options.positionFixed);
 
         // compute auto placement, store placement inside the data object,
         // modifiers will be able to edit `placement` if needed
@@ -890,9 +944,12 @@
         // store the computed placement inside `originalPlacement`
         data.originalPlacement = data.placement;
 
+        data.positionFixed = this.options.positionFixed;
+
         // compute the popper offsets
         data.offsets.popper = getPopperOffsets(this.popper, data.offsets.reference, data.placement);
-        data.offsets.popper.position = 'absolute';
+
+        data.offsets.popper.position = this.options.positionFixed ? 'fixed' : 'absolute';
 
         // run the modifiers
         data = runModifiers(this.modifiers, data);
@@ -932,10 +989,10 @@
         var prefixes = [false, 'ms', 'Webkit', 'Moz', 'O'];
         var upperProp = property.charAt(0).toUpperCase() + property.slice(1);
 
-        for (var i = 0; i < prefixes.length - 1; i++) {
+        for (var i = 0; i < prefixes.length; i++) {
             var prefix = prefixes[i];
             var toCheck = prefix ? '' + prefix + upperProp : property;
-            if (typeof window.document.body.style[toCheck] !== 'undefined') {
+            if (typeof document.body.style[toCheck] !== 'undefined') {
                 return toCheck;
             }
         }
@@ -943,7 +1000,7 @@
     }
 
     /**
-     * Destroy the popper
+     * Destroys the popper.
      * @method
      * @memberof Popper
      */
@@ -953,15 +1010,18 @@
         // touch DOM only if `applyStyle` modifier is enabled
         if (isModifierEnabled(this.modifiers, 'applyStyle')) {
             this.popper.removeAttribute('x-placement');
-            this.popper.style.left = '';
             this.popper.style.position = '';
             this.popper.style.top = '';
+            this.popper.style.left = '';
+            this.popper.style.right = '';
+            this.popper.style.bottom = '';
+            this.popper.style.willChange = '';
             this.popper.style[getSupportedPropertyName('transform')] = '';
         }
 
         this.disableEventListeners();
 
-        // remove the popper if user explicity asked for the deletion on destroy
+        // remove the popper if user explicitly asked for the deletion on destroy
         // do not use `remove` because IE11 doesn't support it
         if (this.options.removeOnDestroy) {
             this.popper.parentNode.removeChild(this.popper);
@@ -969,9 +1029,19 @@
         return this;
     }
 
+    /**
+     * Get the window associated with the element
+     * @argument {Element} element
+     * @returns {Window}
+     */
+    function getWindow(element) {
+        var ownerDocument = element.ownerDocument;
+        return ownerDocument ? ownerDocument.defaultView : window;
+    }
+
     function attachToScrollParents(scrollParent, event, callback, scrollParents) {
         var isBody = scrollParent.nodeName === 'BODY';
-        var target = isBody ? window : scrollParent;
+        var target = isBody ? scrollParent.ownerDocument.defaultView : scrollParent;
         target.addEventListener(event, callback, { passive: true });
 
         if (!isBody) {
@@ -989,7 +1059,7 @@
     function setupEventListeners(reference, options, state, updateBound) {
         // Resize event listener on window
         state.updateBound = updateBound;
-        window.addEventListener('resize', state.updateBound, { passive: true });
+        getWindow(reference).addEventListener('resize', state.updateBound, { passive: true });
 
         // Scroll event listener on scroll parents
         var scrollElement = getScrollParent(reference);
@@ -1020,7 +1090,7 @@
      */
     function removeEventListeners(reference, state) {
         // Remove resize event listener on window
-        window.removeEventListener('resize', state.updateBound);
+        getWindow(reference).removeEventListener('resize', state.updateBound);
 
         // Remove scroll event listener on scroll parents
         state.scrollParents.forEach(function (target) {
@@ -1037,14 +1107,14 @@
 
     /**
      * It will remove resize/scroll events and won't recalculate popper position
-     * when they are triggered. It also won't trigger onUpdate callback anymore,
+     * when they are triggered. It also won't trigger `onUpdate` callback anymore,
      * unless you call `update` method manually.
      * @method
      * @memberof Popper
      */
     function disableEventListeners() {
         if (this.state.eventsEnabled) {
-            window.cancelAnimationFrame(this.scheduleUpdate);
+            cancelAnimationFrame(this.scheduleUpdate);
             this.state = removeEventListeners(this.reference, this.state);
         }
     }
@@ -1118,9 +1188,9 @@
         // they will be set as HTML attributes of the element
         setAttributes(data.instance.popper, data.attributes);
 
-        // if the arrow style has been computed, apply the arrow style
-        if (data.offsets.arrow) {
-            setStyles(data.arrowElement, data.offsets.arrow);
+        // if arrowElement is defined and arrowStyles has some properties
+        if (data.arrowElement && Object.keys(data.arrowStyles).length) {
+            setStyles(data.arrowElement, data.arrowStyles);
         }
 
         return data;
@@ -1133,12 +1203,12 @@
      * @method
      * @memberof Popper.modifiers
      * @param {HTMLElement} reference - The reference element used to position the popper
-     * @param {HTMLElement} popper - The HTML element used as popper.
+     * @param {HTMLElement} popper - The HTML element used as popper
      * @param {Object} options - Popper.js options
      */
     function applyStyleOnLoad(reference, popper, options, modifierOptions, state) {
         // compute reference element offsets
-        var referenceOffsets = getReferenceOffsets(state, popper, reference);
+        var referenceOffsets = getReferenceOffsets(state, popper, reference, options.positionFixed);
 
         // compute auto placement, store placement inside the data object,
         // modifiers will be able to edit `placement` if needed
@@ -1149,11 +1219,62 @@
 
         // Apply `position` to popper before anything else because
         // without the position applied we can't guarantee correct computations
-        setStyles(popper, { position: 'absolute' });
+        setStyles(popper, { position: options.positionFixed ? 'fixed' : 'absolute' });
 
         return options;
     }
 
+    /**
+     * @function
+     * @memberof Popper.Utils
+     * @argument {Object} data - The data object generated by `update` method
+     * @argument {Boolean} shouldRound - If the offsets should be rounded at all
+     * @returns {Object} The popper's position offsets rounded
+     *
+     * The tale of pixel-perfect positioning. It's still not 100% perfect, but as
+     * good as it can be within reason.
+     * Discussion here: https://github.com/FezVrasta/popper.js/pull/715
+     *
+     * Low DPI screens cause a popper to be blurry if not using full pixels (Safari
+     * as well on High DPI screens).
+     *
+     * Firefox prefers no rounding for positioning and does not have blurriness on
+     * high DPI screens.
+     *
+     * Only horizontal placement and left/right values need to be considered.
+     */
+    function getRoundedOffsets(data, shouldRound) {
+        var _data$offsets = data.offsets,
+            popper = _data$offsets.popper,
+            reference = _data$offsets.reference;
+        var round = Math.round,
+            floor = Math.floor;
+
+        var noRound = function noRound(v) {
+            return v;
+        };
+
+        var referenceWidth = round(reference.width);
+        var popperWidth = round(popper.width);
+
+        var isVertical = ['left', 'right'].indexOf(data.placement) !== -1;
+        var isVariation = data.placement.indexOf('-') !== -1;
+        var sameWidthParity = referenceWidth % 2 === popperWidth % 2;
+        var bothOddWidth = referenceWidth % 2 === 1 && popperWidth % 2 === 1;
+
+        var horizontalToInteger = !shouldRound ? noRound : isVertical || isVariation || sameWidthParity ? round : floor;
+        var verticalToInteger = !shouldRound ? noRound : round;
+
+        return {
+            left: horizontalToInteger(bothOddWidth && !isVariation && shouldRound ? popper.left - 1 : popper.left),
+            top: verticalToInteger(popper.top),
+            bottom: verticalToInteger(popper.bottom),
+            right: horizontalToInteger(popper.right)
+        };
+    }
+
+    var isFirefox = isBrowser && /Firefox/i.test(navigator.userAgent);
+
     /**
      * @function
      * @memberof Modifiers
@@ -1184,13 +1305,7 @@
             position: popper.position
         };
 
-        // floor sides to avoid blurry text
-        var offsets = {
-            left: Math.floor(popper.left),
-            top: Math.floor(popper.top),
-            bottom: Math.floor(popper.bottom),
-            right: Math.floor(popper.right)
-        };
+        var offsets = getRoundedOffsets(data, window.devicePixelRatio < 2 || !isFirefox);
 
         var sideA = x === 'bottom' ? 'top' : 'bottom';
         var sideB = y === 'right' ? 'left' : 'right';
@@ -1212,12 +1327,22 @@
         var left = void 0,
             top = void 0;
         if (sideA === 'bottom') {
-            top = -offsetParentRect.height + offsets.bottom;
+            // when offsetParent is <html> the positioning is relative to the bottom of the screen (excluding the scrollbar)
+            // and not the bottom of the html element
+            if (offsetParent.nodeName === 'HTML') {
+                top = -offsetParent.clientHeight + offsets.bottom;
+            } else {
+                top = -offsetParentRect.height + offsets.bottom;
+            }
         } else {
             top = offsets.top;
         }
         if (sideB === 'right') {
-            left = -offsetParentRect.width + offsets.right;
+            if (offsetParent.nodeName === 'HTML') {
+                left = -offsetParent.clientWidth + offsets.right;
+            } else {
+                left = -offsetParentRect.width + offsets.right;
+            }
         } else {
             left = offsets.left;
         }
@@ -1240,9 +1365,10 @@
             'x-placement': data.placement
         };
 
-        // Update attributes and styles of `data`
+        // Update `data` attributes, styles and arrowStyles
         data.attributes = _extends({}, attributes, data.attributes);
         data.styles = _extends({}, styles, data.styles);
+        data.arrowStyles = _extends({}, data.offsets.arrow, data.arrowStyles);
 
         return data;
     }
@@ -1283,6 +1409,8 @@
      * @returns {Object} The data object, properly modified
      */
     function arrow(data, options) {
+        var _data$offsets$arrow;
+
         // arrow depends on keepTogether in order to work
         if (!isModifierRequired(data.instance.modifiers, 'arrow', 'keepTogether')) {
             return data;
@@ -1315,13 +1443,15 @@
         var isVertical = ['left', 'right'].indexOf(placement) !== -1;
 
         var len = isVertical ? 'height' : 'width';
-        var side = isVertical ? 'top' : 'left';
+        var sideCapitalized = isVertical ? 'Top' : 'Left';
+        var side = sideCapitalized.toLowerCase();
         var altSide = isVertical ? 'left' : 'top';
         var opSide = isVertical ? 'bottom' : 'right';
         var arrowElementSize = getOuterSizes(arrowElement)[len];
 
         //
-        // extends keepTogether behavior making sure the popper and its reference have enough pixels in conjuction
+        // extends keepTogether behavior making sure the popper and its
+        // reference have enough pixels in conjunction
         //
 
         // top/left side
@@ -1332,20 +1462,23 @@
         if (reference[side] + arrowElementSize > popper[opSide]) {
             data.offsets.popper[side] += reference[side] + arrowElementSize - popper[opSide];
         }
+        data.offsets.popper = getClientRect(data.offsets.popper);
 
         // compute center of the popper
         var center = reference[side] + reference[len] / 2 - arrowElementSize / 2;
 
         // Compute the sideValue using the updated popper offsets
-        var sideValue = center - getClientRect(data.offsets.popper)[side];
+        // take popper margin in account because we don't have this info available
+        var css = getStyleComputedProperty(data.instance.popper);
+        var popperMarginSide = parseFloat(css['margin' + sideCapitalized], 10);
+        var popperBorderSide = parseFloat(css['border' + sideCapitalized + 'Width'], 10);
+        var sideValue = center - data.offsets.popper[side] - popperMarginSide - popperBorderSide;
 
         // prevent arrowElement from being placed not contiguously to its popper
         sideValue = Math.max(Math.min(popper[len] - arrowElementSize, sideValue), 0);
 
         data.arrowElement = arrowElement;
-        data.offsets.arrow = {};
-        data.offsets.arrow[side] = Math.round(sideValue);
-        data.offsets.arrow[altSide] = ''; // make sure to unset any eventual altSide value from the DOM node
+        data.offsets.arrow = (_data$offsets$arrow = {}, defineProperty(_data$offsets$arrow, side, Math.round(sideValue)), defineProperty(_data$offsets$arrow, altSide, ''), _data$offsets$arrow);
 
         return data;
     }
@@ -1388,7 +1521,7 @@
      * - `top-end` (on top of reference, right aligned)
      * - `right-start` (on right of reference, top aligned)
      * - `bottom` (on bottom, centered)
-     * - `auto-right` (on the side with more space available, alignment depends by placement)
+     * - `auto-end` (on the side with more space available, alignment depends by placement)
      *
      * @static
      * @type {Array}
@@ -1444,7 +1577,7 @@
             return data;
         }
 
-        var boundaries = getBoundaries(data.instance.popper, data.instance.reference, options.padding, options.boundariesElement);
+        var boundaries = getBoundaries(data.instance.popper, data.instance.reference, options.padding, options.boundariesElement, data.positionFixed);
 
         var placement = data.placement.split('-')[0];
         var placementOpposite = getOppositePlacement(placement);
@@ -1490,7 +1623,14 @@
 
             // flip the variation if required
             var isVertical = ['top', 'bottom'].indexOf(placement) !== -1;
-            var flippedVariation = !!options.flipVariations && (isVertical && variation === 'start' && overflowsLeft || isVertical && variation === 'end' && overflowsRight || !isVertical && variation === 'start' && overflowsTop || !isVertical && variation === 'end' && overflowsBottom);
+
+            // flips variation if reference element overflows boundaries
+            var flippedVariationByRef = !!options.flipVariations && (isVertical && variation === 'start' && overflowsLeft || isVertical && variation === 'end' && overflowsRight || !isVertical && variation === 'start' && overflowsTop || !isVertical && variation === 'end' && overflowsBottom);
+
+            // flips variation if popper content overflows boundaries
+            var flippedVariationByContent = !!options.flipVariationsByContent && (isVertical && variation === 'start' && overflowsRight || isVertical && variation === 'end' && overflowsLeft || !isVertical && variation === 'start' && overflowsBottom || !isVertical && variation === 'end' && overflowsTop);
+
+            var flippedVariation = flippedVariationByRef || flippedVariationByContent;
 
             if (overlapsRef || overflowsBoundaries || flippedVariation) {
                 // this boolean to detect any flip loop
@@ -1736,7 +1876,27 @@
             boundariesElement = getOffsetParent(boundariesElement);
         }
 
-        var boundaries = getBoundaries(data.instance.popper, data.instance.reference, options.padding, boundariesElement);
+        // NOTE: DOM access here
+        // resets the popper's position so that the document size can be calculated excluding
+        // the size of the popper element itself
+        var transformProp = getSupportedPropertyName('transform');
+        var popperStyles = data.instance.popper.style; // assignment to help minification
+        var top = popperStyles.top,
+            left = popperStyles.left,
+            transform = popperStyles[transformProp];
+
+        popperStyles.top = '';
+        popperStyles.left = '';
+        popperStyles[transformProp] = '';
+
+        var boundaries = getBoundaries(data.instance.popper, data.instance.reference, options.padding, boundariesElement, data.positionFixed);
+
+        // NOTE: DOM access here
+        // restores the original style properties after the offsets have been computed
+        popperStyles.top = top;
+        popperStyles.left = left;
+        popperStyles[transformProp] = transform;
+
         options.boundaries = boundaries;
 
         var order = options.priority;
@@ -1859,7 +2019,7 @@
 
         var subtractLength = ['top', 'left'].indexOf(basePlacement) === -1;
 
-        popper[isHoriz ? 'left' : 'top'] = reference[placement] - (subtractLength ? popper[isHoriz ? 'width' : 'height'] : 0);
+        popper[isHoriz ? 'left' : 'top'] = reference[basePlacement] - (subtractLength ? popper[isHoriz ? 'width' : 'height'] : 0);
 
         data.placement = getOppositePlacement(placement);
         data.offsets.popper = getClientRect(popper);
@@ -1910,7 +2070,7 @@
          * The `offset` modifier can shift your popper on both its axis.
          *
          * It accepts the following units:
-         * - `px` or unitless, interpreted as pixels
+         * - `px` or unit-less, interpreted as pixels
          * - `%` or `%r`, percentage relative to the length of the reference element
          * - `%p`, percentage relative to the length of the popper element
          * - `vw`, CSS viewport width unit
@@ -1918,7 +2078,7 @@
          *
          * For length is intended the main axis relative to the placement of the popper.<br />
          * This means that if the placement is `top` or `bottom`, the length will be the
-         * `width`. In case of `left` or `right`, it will be the height.
+         * `width`. In case of `left` or `right`, it will be the `height`.
          *
          * You can provide a single value (as `Number` or `String`), or a pair of values
          * as `String` divided by a comma or one (or more) white spaces.<br />
@@ -1937,6 +2097,9 @@
          * '10 - 5vh + 3%'
          * '-10px + 5vh, 5px - 6%'
          * ```
+         * > **NB**: If you desire to apply offsets to your poppers in a way that may make them overlap
+         * > with their reference element, unfortunately, you will have to disable the `flip` modifier.
+         * > You can read more on this at this [issue](https://github.com/FezVrasta/popper.js/issues/373).
          *
          * @memberof modifiers
          * @inner
@@ -1957,7 +2120,7 @@
         /**
          * Modifier used to prevent the popper from being positioned outside the boundary.
          *
-         * An scenario exists where the reference itself is not within the boundaries.<br />
+         * A scenario exists where the reference itself is not within the boundaries.<br />
          * We can say it has "escaped the boundaries" — or just "escaped".<br />
          * In this case we need to decide whether the popper should either:
          *
@@ -1987,23 +2150,23 @@
             /**
              * @prop {number} padding=5
              * Amount of pixel used to define a minimum distance between the boundaries
-             * and the popper this makes sure the popper has always a little padding
+             * and the popper. This makes sure the popper always has a little padding
              * between the edges of its container
              */
             padding: 5,
             /**
              * @prop {String|HTMLElement} boundariesElement='scrollParent'
-             * Boundaries used by the modifier, can be `scrollParent`, `window`,
+             * Boundaries used by the modifier. Can be `scrollParent`, `window`,
              * `viewport` or any DOM element.
              */
             boundariesElement: 'scrollParent'
         },
 
         /**
-         * Modifier used to make sure the reference and its popper stay near eachothers
-         * without leaving any gap between the two. Expecially useful when the arrow is
-         * enabled and you want to assure it to point to its reference element.
-         * It cares only about the first axis, you can still have poppers with margin
+         * Modifier used to make sure the reference and its popper stay near each other
+         * without leaving any gap between the two. Especially useful when the arrow is
+         * enabled and you want to ensure that it points to its reference element.
+         * It cares only about the first axis. You can still have poppers with margin
          * between the popper and its reference element.
          * @memberof modifiers
          * @inner
@@ -2021,7 +2184,7 @@
          * This modifier is used to move the `arrowElement` of the popper to make
          * sure it is positioned between the reference element and its popper element.
          * It will read the outer size of the `arrowElement` node to detect how many
-         * pixels of conjuction are needed.
+         * pixels of conjunction are needed.
          *
          * It has no effect if no `arrowElement` is provided.
          * @memberof modifiers
@@ -2060,7 +2223,7 @@
              * @prop {String|Array} behavior='flip'
              * The behavior used to change the popper's placement. It can be one of
              * `flip`, `clockwise`, `counterclockwise` or an array with a list of valid
-             * placements (with optional variations).
+             * placements (with optional variations)
              */
             behavior: 'flip',
             /**
@@ -2070,11 +2233,27 @@
             padding: 5,
             /**
              * @prop {String|HTMLElement} boundariesElement='viewport'
-             * The element which will define the boundaries of the popper position,
-             * the popper will never be placed outside of the defined boundaries
-             * (except if keepTogether is enabled)
+             * The element which will define the boundaries of the popper position.
+             * The popper will never be placed outside of the defined boundaries
+             * (except if `keepTogether` is enabled)
              */
-            boundariesElement: 'viewport'
+            boundariesElement: 'viewport',
+            /**
+             * @prop {Boolean} flipVariations=false
+             * The popper will switch placement variation between `-start` and `-end` when
+             * the reference element overlaps its boundaries.
+             *
+             * The original placement should have a set variation.
+             */
+            flipVariations: false,
+            /**
+             * @prop {Boolean} flipVariationsByContent=false
+             * The popper will switch placement variation between `-start` and `-end` when
+             * the popper element overlaps its reference boundaries.
+             *
+             * The original placement should have a set variation.
+             */
+            flipVariationsByContent: false
         },
 
         /**
@@ -2136,8 +2315,8 @@
             fn: computeStyle,
             /**
              * @prop {Boolean} gpuAcceleration=true
-             * If true, it uses the CSS 3d transformation to position the popper.
-             * Otherwise, it will use the `top` and `left` properties.
+             * If true, it uses the CSS 3D transformation to position the popper.
+             * Otherwise, it will use the `top` and `left` properties
              */
             gpuAcceleration: true,
             /**
@@ -2164,7 +2343,7 @@
          * Note that if you disable this modifier, you must make sure the popper element
          * has its position set to `absolute` before Popper.js can do its work!
          *
-         * Just disable this modifier and define you own to achieve the desired effect.
+         * Just disable this modifier and define your own to achieve the desired effect.
          *
          * @memberof modifiers
          * @inner
@@ -2181,26 +2360,27 @@
             /**
              * @deprecated since version 1.10.0, the property moved to `computeStyle` modifier
              * @prop {Boolean} gpuAcceleration=true
-             * If true, it uses the CSS 3d transformation to position the popper.
-             * Otherwise, it will use the `top` and `left` properties.
+             * If true, it uses the CSS 3D transformation to position the popper.
+             * Otherwise, it will use the `top` and `left` properties
              */
             gpuAcceleration: undefined
         }
     };
 
     /**
-     * The `dataObject` is an object containing all the informations used by Popper.js
-     * this object get passed to modifiers and to the `onCreate` and `onUpdate` callbacks.
+     * The `dataObject` is an object containing all the information used by Popper.js.
+     * This object is passed to modifiers and to the `onCreate` and `onUpdate` callbacks.
      * @name dataObject
      * @property {Object} data.instance The Popper.js instance
      * @property {String} data.placement Placement applied to popper
      * @property {String} data.originalPlacement Placement originally defined on init
      * @property {Boolean} data.flipped True if popper has been flipped by flip modifier
-     * @property {Boolean} data.hide True if the reference element is out of boundaries, useful to know when to hide the popper.
+     * @property {Boolean} data.hide True if the reference element is out of boundaries, useful to know when to hide the popper
      * @property {HTMLElement} data.arrowElement Node used as arrow by arrow modifier
-     * @property {Object} data.styles Any CSS property defined here will be applied to the popper, it expects the JavaScript nomenclature (eg. `marginBottom`)
+     * @property {Object} data.styles Any CSS property defined here will be applied to the popper. It expects the JavaScript nomenclature (eg. `marginBottom`)
+     * @property {Object} data.arrowStyles Any CSS property defined here will be applied to the popper arrow. It expects the JavaScript nomenclature (eg. `marginBottom`)
      * @property {Object} data.boundaries Offsets of the popper boundaries
-     * @property {Object} data.offsets The measurements of popper, reference and arrow elements.
+     * @property {Object} data.offsets The measurements of popper, reference and arrow elements
      * @property {Object} data.offsets.popper `top`, `left`, `width`, `height` values
      * @property {Object} data.offsets.reference `top`, `left`, `width`, `height` values
      * @property {Object} data.offsets.arrow] `top` and `left` offsets, only one of them will be different from 0
@@ -2208,9 +2388,9 @@
 
     /**
      * Default options provided to Popper.js constructor.<br />
-     * These can be overriden using the `options` argument of Popper.js.<br />
-     * To override an option, simply pass as 3rd argument an object with the same
-     * structure of this object, example:
+     * These can be overridden using the `options` argument of Popper.js.<br />
+     * To override an option, simply pass an object with the same
+     * structure of the `options` object, as the 3rd argument. For example:
      * ```
      * new Popper(ref, pop, {
      *   modifiers: {
@@ -2224,13 +2404,19 @@
      */
     var Defaults = {
         /**
-         * Popper's placement
+         * Popper's placement.
          * @prop {Popper.placements} placement='bottom'
          */
         placement: 'bottom',
 
         /**
-         * Whether events (resize, scroll) are initially enabled
+         * Set this to true if you want popper to position it self in 'fixed' mode
+         * @prop {Boolean} positionFixed=false
+         */
+        positionFixed: false,
+
+        /**
+         * Whether events (resize, scroll) are initially enabled.
          * @prop {Boolean} eventsEnabled=true
          */
         eventsEnabled: true,
@@ -2244,17 +2430,17 @@
 
         /**
          * Callback called when the popper is created.<br />
-         * By default, is set to no-op.<br />
+         * By default, it is set to no-op.<br />
          * Access Popper.js instance with `data.instance`.
          * @prop {onCreate}
          */
         onCreate: function onCreate() { },
 
         /**
-         * Callback called when the popper is updated, this callback is not called
+         * Callback called when the popper is updated. This callback is not called
          * on the initialization/creation of the popper, but only on subsequent
          * updates.<br />
-         * By default, is set to no-op.<br />
+         * By default, it is set to no-op.<br />
          * Access Popper.js instance with `data.instance`.
          * @prop {onUpdate}
          */
@@ -2262,7 +2448,7 @@
 
         /**
          * List of modifiers used to modify the offsets before they are applied to the popper.
-         * They provide most of the functionalities of Popper.js
+         * They provide most of the functionalities of Popper.js.
          * @prop {modifiers}
          */
         modifiers: modifiers
@@ -2282,10 +2468,10 @@
     // Methods
     var Popper = function () {
         /**
-         * Create a new Popper.js instance
+         * Creates a new Popper.js instance.
          * @class Popper
-         * @param {HTMLElement|referenceObject} reference - The reference element used to position the popper
-         * @param {HTMLElement} popper - The HTML element used as popper.
+         * @param {Element|referenceObject} reference - The reference element used to position the popper
+         * @param {Element} popper - The HTML / XML element used as the popper
          * @param {Object} options - Your custom options to override the ones defined in [Defaults](#defaults)
          * @return {Object} instance - The generated Popper.js instance
          */
@@ -2313,8 +2499,8 @@
             };
 
             // get reference and popper elements (allow jQuery wrappers)
-            this.reference = reference.jquery ? reference[0] : reference;
-            this.popper = popper.jquery ? popper[0] : popper;
+            this.reference = reference && reference.jquery ? reference[0] : reference;
+            this.popper = popper && popper.jquery ? popper[0] : popper;
 
             // Deep merge modifiers options
             this.options.modifiers = {};
@@ -2381,7 +2567,7 @@
             }
 
             /**
-             * Schedule an update, it will run on the next UI update available
+             * Schedules an update. It will run on the next UI update available.
              * @method scheduleUpdate
              * @memberof Popper
              */
@@ -2418,7 +2604,7 @@
      * new Popper(referenceObject, popperNode);
      * ```
      *
-     * NB: This feature isn't supported in Internet Explorer 10
+     * NB: This feature isn't supported in Internet Explorer 10.
      * @name referenceObject
      * @property {Function} data.getBoundingClientRect
      * A function that returns a set of coordinates compatible with the native `getBoundingClientRect` method.
diff --git a/BTCPayServer/wwwroot/vendor/popper/popper.min.js b/BTCPayServer/wwwroot/vendor/popper/popper.min.js
index 95e9ef5a2..75447feb8 100644
--- a/BTCPayServer/wwwroot/vendor/popper/popper.min.js
+++ b/BTCPayServer/wwwroot/vendor/popper/popper.min.js
@@ -1,5 +1,5 @@
 /*
- Copyright (C) Federico Zivolo 2017
+ Copyright (C) Federico Zivolo 2019
  Distributed under the MIT License (license terms are at http://opensource.org/licenses/MIT).
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t.setAttribute('x-placement',p),U(t,{position:'absolute'}),o},gpuAcceleration:void 0}}},le});
+ */(function (e, t) { 'object' == typeof exports && 'undefined' != typeof module ? module.exports = t() : 'function' == typeof define && define.amd ? define(t) : e.Popper = t() })(this, function () { 'use strict'; function e(e) { return e && '[object Function]' === {}.toString.call(e) } function t(e, t) { if (1 !== e.nodeType) return []; var o = e.ownerDocument.defaultView, n = o.getComputedStyle(e, null); return t ? n[t] : n } function o(e) { return 'HTML' === e.nodeName ? e : e.parentNode || e.host } function n(e) { if (!e) return document.body; switch (e.nodeName) { case 'HTML': case 'BODY': return e.ownerDocument.body; case '#document': return e.body; }var i = t(e), r = i.overflow, p = i.overflowX, s = i.overflowY; return /(auto|scroll|overlay)/.test(r + s + p) ? e : n(o(e)) } function i(e) { return e && e.referenceNode ? e.referenceNode : e } function r(e) { return 11 === e ? re : 10 === e ? pe : re || pe } function p(e) { if (!e) return document.documentElement; for (var o = r(10) ? document.body : null, n = e.offsetParent || null; n === o && e.nextElementSibling;)n = (e = e.nextElementSibling).offsetParent; var i = n && n.nodeName; return i && 'BODY' !== i && 'HTML' !== i ? -1 !== ['TH', 'TD', 'TABLE'].indexOf(n.nodeName) && 'static' === t(n, 'position') ? p(n) : n : e ? e.ownerDocument.documentElement : document.documentElement } function s(e) { var t = e.nodeName; return 'BODY' !== t && ('HTML' === t || p(e.firstElementChild) === e) } function d(e) { return null === e.parentNode ? e : d(e.parentNode) } function a(e, t) { if (!e || !e.nodeType || !t || !t.nodeType) return document.documentElement; var o = e.compareDocumentPosition(t) & Node.DOCUMENT_POSITION_FOLLOWING, n = o ? e : t, i = o ? t : e, r = document.createRange(); r.setStart(n, 0), r.setEnd(i, 0); var l = r.commonAncestorContainer; if (e !== l && t !== l || n.contains(i)) return s(l) ? l : p(l); var f = d(e); return f.host ? a(f.host, t) : a(e, d(t).host) } function l(e) { var t = 1 < arguments.length && void 0 !== arguments[1] ? arguments[1] : 'top', o = 'top' === t ? 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'' + i + o : e; if ('undefined' != typeof document.body.style[r]) return r } return null } function H() { return this.state.isDestroyed = !0, W(this.modifiers, 'applyStyle') && (this.popper.removeAttribute('x-placement'), this.popper.style.position = '', this.popper.style.top = '', this.popper.style.left = '', this.popper.style.right = '', this.popper.style.bottom = '', this.popper.style.willChange = '', this.popper.style[B('transform')] = ''), this.disableEventListeners(), this.options.removeOnDestroy && this.popper.parentNode.removeChild(this.popper), this } function A(e) { var t = e.ownerDocument; return t ? t.defaultView : window } function M(e, t, o, i) { var r = 'BODY' === e.nodeName, p = r ? e.ownerDocument.defaultView : e; p.addEventListener(t, o, { passive: !0 }), r || M(n(p.parentNode), t, o, i), i.push(p) } function F(e, t, o, i) { o.updateBound = i, A(e).addEventListener('resize', o.updateBound, { passive: !0 }); var r = n(e); return M(r, 'scroll', o.updateBound, o.scrollParents), o.scrollElement = r, o.eventsEnabled = !0, o } function I() { this.state.eventsEnabled || (this.state = F(this.reference, this.options, this.state, this.scheduleUpdate)) } function R(e, t) { return A(e).removeEventListener('resize', t.updateBound), t.scrollParents.forEach(function (e) { e.removeEventListener('scroll', t.updateBound) }), t.updateBound = null, t.scrollParents = [], t.scrollElement = null, t.eventsEnabled = !1, t } function U() { this.state.eventsEnabled && (cancelAnimationFrame(this.scheduleUpdate), this.state = R(this.reference, this.state)) } function Y(e) { return '' !== e && !isNaN(parseFloat(e)) && isFinite(e) } function V(e, t) { Object.keys(t).forEach(function (o) { var n = ''; -1 !== ['width', 'height', 'top', 'right', 'bottom', 'left'].indexOf(o) && Y(t[o]) && (n = 'px'), e.style[o] = t[o] + n }) } function j(e, t) { Object.keys(t).forEach(function (o) { var n = t[o]; !1 === n ? e.removeAttribute(o) : e.setAttribute(o, t[o]) }) } function q(e, t) { var o = e.offsets, n = o.popper, i = o.reference, r = $, p = function (e) { return e }, s = r(i.width), d = r(n.width), a = -1 !== ['left', 'right'].indexOf(e.placement), l = -1 !== e.placement.indexOf('-'), f = t ? a || l || s % 2 == d % 2 ? r : Z : p, m = t ? r : p; return { left: f(1 == s % 2 && 1 == d % 2 && !l && t ? n.left - 1 : n.left), top: m(n.top), bottom: m(n.bottom), right: f(n.right) } } function K(e, t, o) { var n = D(e, function (e) { var o = e.name; return o === t }), i = !!n && e.some(function (e) { return e.name === o && e.enabled && e.order < n.order }); if (!i) { var r = '`' + t + '`'; console.warn('`' + o + '`' + ' modifier is required by ' + r + ' modifier in order to work, be sure to include it before ' + r + '!') } return i } function z(e) { return 'end' === e ? 'start' : 'start' === e ? 'end' : e } function G(e) { var t = 1 < arguments.length && void 0 !== arguments[1] && arguments[1], o = he.indexOf(e), n = he.slice(o + 1).concat(he.slice(0, o)); return t ? n.reverse() : n } function _(e, t, o, n) { var i = e.match(/((?:\-|\+)?\d*\.?\d*)(.*)/), r = +i[1], p = i[2]; if (!r) return e; if (0 === p.indexOf('%')) { var s; switch (p) { case '%p': s = o; break; case '%': case '%r': default: s = n; }var d = g(s); return d[t] / 100 * r } if ('vh' === p || 'vw' === p) { var a; return a = 'vh' === p ? ee(document.documentElement.clientHeight, window.innerHeight || 0) : ee(document.documentElement.clientWidth, window.innerWidth || 0), a / 100 * r } return r } function X(e, t, o, n) { var i = [0, 0], r = -1 !== ['right', 'left'].indexOf(n), p = e.split(/(\+|\-)/).map(function (e) { return e.trim() }), s = p.indexOf(D(p, function (e) { return -1 !== e.search(/,|\s/) })); p[s] && -1 === p[s].indexOf(',') && console.warn('Offsets separated by white space(s) are deprecated, use a comma (,) instead.'); var d = /\s*,\s*|\s+/, a = -1 === s ? [p] : [p.slice(0, s).concat([p[s].split(d)[0]]), [p[s].split(d)[1]].concat(p.slice(s + 1))]; return a = a.map(function (e, n) { var i = (1 === n ? !r : r) ? 'height' : 'width', p = !1; return e.reduce(function (e, t) { return '' === e[e.length - 1] && -1 !== ['+', '-'].indexOf(t) ? (e[e.length - 1] = t, p = !0, e) : p ? (e[e.length - 1] += t, p = !1, e) : e.concat(t) }, []).map(function (e) { return _(e, i, t, o) }) }), a.forEach(function (e, t) { e.forEach(function (o, n) { Y(o) && (i[t] += o * ('-' === e[n - 1] ? -1 : 1)) }) }), i } function J(e, t) { var o, n = t.offset, i = e.placement, r = e.offsets, p = r.popper, s = r.reference, d = i.split('-')[0]; return o = Y(+n) ? [+n, 0] : X(n, p, s, d), 'left' === d ? (p.top += o[0], p.left -= o[1]) : 'right' === d ? (p.top += o[0], p.left += o[1]) : 'top' === d ? (p.left += o[0], p.top -= o[1]) : 'bottom' === d && (p.left += o[0], p.top += o[1]), e.popper = p, e } var Q = Math.min, Z = Math.floor, $ = Math.round, ee = Math.max, te = 'undefined' != typeof window && 'undefined' != typeof document && 'undefined' != typeof navigator, oe = function () { for (var e = ['Edge', 'Trident', 'Firefox'], t = 0; t < e.length; t += 1)if (te && 0 <= navigator.userAgent.indexOf(e[t])) return 1; return 0 }(), ne = te && window.Promise, ie = ne ? function (e) { var t = !1; return function () { t || (t = !0, window.Promise.resolve().then(function () { t = !1, e() })) } } : function (e) { var t = !1; return function () { t || (t = !0, setTimeout(function () { t = !1, e() }, oe)) } }, re = te && !!(window.MSInputMethodContext && document.documentMode), pe = te && /MSIE 10/.test(navigator.userAgent), se = function (e, t) { if (!(e instanceof t)) throw new TypeError('Cannot call a class as a function') }, de = function () { function e(e, t) { for (var o, n = 0; n < t.length; n++)o = t[n], o.enumerable = o.enumerable || !1, o.configurable = !0, 'value' in o && (o.writable = !0), Object.defineProperty(e, o.key, o) } return function (t, o, n) { return o && e(t.prototype, o), n && e(t, n), t } }(), ae = function (e, t, o) { return t in e ? Object.defineProperty(e, t, { value: o, enumerable: !0, configurable: !0, writable: !0 }) : e[t] = o, e }, le = Object.assign || function (e) { for (var t, o = 1; o < arguments.length; o++)for (var n in t = arguments[o], t) Object.prototype.hasOwnProperty.call(t, n) && (e[n] = t[n]); return e }, fe = te && /Firefox/i.test(navigator.userAgent), me = ['auto-start', 'auto', 'auto-end', 'top-start', 'top', 'top-end', 'right-start', 'right', 'right-end', 'bottom-end', 'bottom', 'bottom-start', 'left-end', 'left', 'left-start'], he = me.slice(3), ce = { FLIP: 'flip', CLOCKWISE: 'clockwise', COUNTERCLOCKWISE: 'counterclockwise' }, ge = function () { function t(o, n) { var i = this, r = 2 < arguments.length && void 0 !== arguments[2] ? arguments[2] : {}; se(this, t), this.scheduleUpdate = function () { return requestAnimationFrame(i.update) }, this.update = ie(this.update.bind(this)), this.options = le({}, t.Defaults, r), this.state = { isDestroyed: !1, isCreated: !1, scrollParents: [] }, this.reference = o && o.jquery ? o[0] : o, this.popper = n && n.jquery ? n[0] : n, this.options.modifiers = {}, Object.keys(le({}, t.Defaults.modifiers, r.modifiers)).forEach(function (e) { i.options.modifiers[e] = le({}, t.Defaults.modifiers[e] || {}, r.modifiers ? r.modifiers[e] : {}) }), this.modifiers = Object.keys(this.options.modifiers).map(function (e) { return le({ name: e }, i.options.modifiers[e]) }).sort(function (e, t) { return e.order - t.order }), this.modifiers.forEach(function (t) { t.enabled && e(t.onLoad) && t.onLoad(i.reference, i.popper, i.options, t, i.state) }), this.update(); var p = this.options.eventsEnabled; p && this.enableEventListeners(), this.state.eventsEnabled = p } return de(t, [{ key: 'update', value: function () { return k.call(this) } }, { key: 'destroy', value: function () { return H.call(this) } }, { key: 'enableEventListeners', value: function () { return I.call(this) } }, { key: 'disableEventListeners', value: function () { return U.call(this) } }]), t }(); return ge.Utils = ('undefined' == typeof window ? global : window).PopperUtils, ge.placements = me, ge.Defaults = { placement: 'bottom', positionFixed: !1, eventsEnabled: !0, removeOnDestroy: !1, onCreate: function () { }, onUpdate: function () { }, modifiers: { shift: { order: 100, enabled: !0, fn: function (e) { var t = e.placement, o = t.split('-')[0], n = t.split('-')[1]; if (n) { var i = e.offsets, r = i.reference, p = i.popper, s = -1 !== ['bottom', 'top'].indexOf(o), d = s ? 'left' : 'top', a = s ? 'width' : 'height', l = { start: ae({}, d, r[d]), end: ae({}, d, r[d] + r[a] - p[a]) }; e.offsets.popper = le({}, p, l[n]) } return e } }, offset: { order: 200, enabled: !0, fn: J, offset: 0 }, preventOverflow: { order: 300, enabled: !0, fn: function (e, t) { var o = t.boundariesElement || p(e.instance.popper); e.instance.reference === o && (o = p(o)); var n = B('transform'), i = e.instance.popper.style, r = i.top, s = i.left, d = i[n]; i.top = '', i.left = '', i[n] = ''; var a = v(e.instance.popper, e.instance.reference, t.padding, o, e.positionFixed); i.top = r, i.left = s, i[n] = d, t.boundaries = a; var l = t.priority, f = e.offsets.popper, m = { primary: function (e) { var o = f[e]; return f[e] < a[e] && !t.escapeWithReference && (o = ee(f[e], a[e])), ae({}, e, o) }, secondary: function (e) { var o = 'right' === e ? 'left' : 'top', n = f[o]; return f[e] > a[e] && !t.escapeWithReference && (n = Q(f[o], a[e] - ('right' === e ? f.width : f.height))), ae({}, o, n) } }; return l.forEach(function (e) { var t = -1 === ['left', 'top'].indexOf(e) ? 'secondary' : 'primary'; f = le({}, f, m[t](e)) }), e.offsets.popper = f, e }, priority: ['left', 'right', 'top', 'bottom'], padding: 5, boundariesElement: 'scrollParent' }, keepTogether: { order: 400, enabled: !0, fn: function (e) { var t = e.offsets, o = t.popper, n = t.reference, i = e.placement.split('-')[0], r = Z, p = -1 !== ['top', 'bottom'].indexOf(i), s = p ? 'right' : 'bottom', d = p ? 'left' : 'top', a = p ? 'width' : 'height'; return o[s] < r(n[d]) && (e.offsets.popper[d] = r(n[d]) - o[a]), o[d] > r(n[s]) && (e.offsets.popper[d] = r(n[s])), e } }, arrow: { order: 500, enabled: !0, fn: function (e, o) { var n; if (!K(e.instance.modifiers, 'arrow', 'keepTogether')) return e; var i = o.element; if ('string' == typeof i) { if (i = e.instance.popper.querySelector(i), !i) return e; } else if (!e.instance.popper.contains(i)) return console.warn('WARNING: `arrow.element` must be child of its popper element!'), e; var r = e.placement.split('-')[0], p = e.offsets, s = p.popper, d = p.reference, a = -1 !== ['left', 'right'].indexOf(r), l = a ? 'height' : 'width', f = a ? 'Top' : 'Left', m = f.toLowerCase(), h = a ? 'left' : 'top', c = a ? 'bottom' : 'right', u = S(i)[l]; d[c] - u < s[m] && (e.offsets.popper[m] -= s[m] - (d[c] - u)), d[m] + u > s[c] && (e.offsets.popper[m] += d[m] + u - s[c]), e.offsets.popper = g(e.offsets.popper); var b = d[m] + d[l] / 2 - u / 2, w = t(e.instance.popper), y = parseFloat(w['margin' + f], 10), E = parseFloat(w['border' + f + 'Width'], 10), v = b - e.offsets.popper[m] - y - E; return v = ee(Q(s[l] - u, v), 0), e.arrowElement = i, e.offsets.arrow = (n = {}, ae(n, m, $(v)), ae(n, h, ''), n), e }, element: '[x-arrow]' }, flip: { order: 600, enabled: !0, fn: function (e, t) { if (W(e.instance.modifiers, 'inner')) return e; if (e.flipped && e.placement === e.originalPlacement) return e; var o = v(e.instance.popper, e.instance.reference, t.padding, t.boundariesElement, e.positionFixed), n = e.placement.split('-')[0], i = T(n), r = e.placement.split('-')[1] || '', p = []; switch (t.behavior) { case ce.FLIP: p = [n, i]; break; case ce.CLOCKWISE: p = G(n); break; case ce.COUNTERCLOCKWISE: p = G(n, !0); break; default: p = t.behavior; }return p.forEach(function (s, d) { if (n !== s || p.length === d + 1) return e; n = e.placement.split('-')[0], i = T(n); var a = e.offsets.popper, l = e.offsets.reference, f = Z, m = 'left' === n && f(a.right) > f(l.left) || 'right' === n && f(a.left) < f(l.right) || 'top' === n && f(a.bottom) > f(l.top) || 'bottom' === n && f(a.top) < f(l.bottom), h = f(a.left) < f(o.left), c = f(a.right) > f(o.right), g = f(a.top) < f(o.top), u = f(a.bottom) > f(o.bottom), b = 'left' === n && h || 'right' === n && c || 'top' === n && g || 'bottom' === n && u, w = -1 !== ['top', 'bottom'].indexOf(n), y = !!t.flipVariations && (w && 'start' === r && h || w && 'end' === r && c || !w && 'start' === r && g || !w && 'end' === r && u), E = !!t.flipVariationsByContent && (w && 'start' === r && c || w && 'end' === r && h || !w && 'start' === r && u || !w && 'end' === r && g), v = y || E; (m || b || v) && (e.flipped = !0, (m || b) && (n = p[d + 1]), v && (r = z(r)), e.placement = n + (r ? '-' + r : ''), e.offsets.popper = le({}, e.offsets.popper, C(e.instance.popper, e.offsets.reference, e.placement)), e = P(e.instance.modifiers, e, 'flip')) }), e }, behavior: 'flip', padding: 5, boundariesElement: 'viewport', flipVariations: !1, flipVariationsByContent: !1 }, inner: { order: 700, enabled: !1, fn: function (e) { var t = e.placement, o = t.split('-')[0], n = e.offsets, i = n.popper, r = n.reference, p = -1 !== ['left', 'right'].indexOf(o), s = -1 === ['top', 'left'].indexOf(o); return i[p ? 'left' : 'top'] = r[o] - (s ? i[p ? 'width' : 'height'] : 0), e.placement = T(t), e.offsets.popper = g(i), e } }, hide: { order: 800, enabled: !0, fn: function (e) { if (!K(e.instance.modifiers, 'hide', 'preventOverflow')) return e; var t = e.offsets.reference, o = D(e.instance.modifiers, function (e) { return 'preventOverflow' === e.name }).boundaries; if (t.bottom < o.top || t.left > o.right || t.top > o.bottom || t.right < o.left) { if (!0 === e.hide) return e; e.hide = !0, e.attributes['x-out-of-boundaries'] = '' } else { if (!1 === e.hide) return e; e.hide = !1, e.attributes['x-out-of-boundaries'] = !1 } return e } }, computeStyle: { order: 850, enabled: !0, fn: function (e, t) { var o = t.x, n = t.y, i = e.offsets.popper, r = D(e.instance.modifiers, function (e) { return 'applyStyle' === e.name }).gpuAcceleration; void 0 !== r && console.warn('WARNING: `gpuAcceleration` option moved to `computeStyle` modifier and will not be supported in future versions of Popper.js!'); var s, d, a = void 0 === r ? t.gpuAcceleration : r, l = p(e.instance.popper), f = u(l), m = { position: i.position }, h = q(e, 2 > window.devicePixelRatio || !fe), c = 'bottom' === o ? 'top' : 'bottom', g = 'right' === n ? 'left' : 'right', b = B('transform'); if (d = 'bottom' == c ? 'HTML' === l.nodeName ? -l.clientHeight + h.bottom : -f.height + h.bottom : h.top, s = 'right' == g ? 'HTML' === l.nodeName ? -l.clientWidth + h.right : -f.width + h.right : h.left, a && b) m[b] = 'translate3d(' + s + 'px, ' + d + 'px, 0)', m[c] = 0, m[g] = 0, m.willChange = 'transform'; else { var w = 'bottom' == c ? -1 : 1, y = 'right' == g ? -1 : 1; m[c] = d * w, m[g] = s * y, m.willChange = c + ', ' + g } var E = { "x-placement": e.placement }; return e.attributes = le({}, E, e.attributes), e.styles = le({}, m, e.styles), e.arrowStyles = le({}, e.offsets.arrow, e.arrowStyles), e }, gpuAcceleration: !0, x: 'bottom', y: 'right' }, applyStyle: { order: 900, enabled: !0, fn: function (e) { return V(e.instance.popper, e.styles), j(e.instance.popper, e.attributes), e.arrowElement && Object.keys(e.arrowStyles).length && V(e.arrowElement, e.arrowStyles), e }, onLoad: function (e, t, o, n, i) { var r = L(i, t, e, o.positionFixed), p = O(o.placement, r, t, e, o.modifiers.flip.boundariesElement, o.modifiers.flip.padding); return t.setAttribute('x-placement', p), V(t, { position: o.positionFixed ? 'fixed' : 'absolute' }), o }, gpuAcceleration: void 0 } } }, ge });
 //# sourceMappingURL=popper.min.js.map