Update buy/sell icons and remove unused once

desktop/src/main/java/bisq/desktop/bisq.css

@@ -1684,7 +1684,6 @@ textfield */
     -fx-text-fill: -bs-rd-white;
 }
 
-
 #sell-button-big {
     -fx-background-color: -bs-sell;
     -fx-text-fill: -bs-rd-white;
@@ -1696,6 +1695,12 @@ textfield */
     -fx-text-fill: -bs-rd-white;
 }
 
+#sell-button-big.grey-style, #buy-button-big.grey-style,
+#sell-button.grey-style, #buy-button.grey-style {
+    -fx-background-color: -bs-rd-grey-light;
+    -fx-text-fill: -bs-rd-font-dark-grey;
+}
+
 .action-button:disabled, #sell-button:disabled, #buy-button:disabled {
     -fx-background-color: -bs-rd-grey-very-light;
     -fx-text-fill: -bs-rd-font-dark-grey;

desktop/src/main/java/bisq/desktop/images.css

@@ -29,22 +29,22 @@
     -fx-image: url("../../images/remove.png");
 }
 
-#image-buy {
-    -fx-image: url("../../images/buy.png");
-}
-
 #image-buy-white {
     -fx-image: url("../../images/buy_white.png");
 }
 
-#image-sell {
-    -fx-image: url("../../images/sell.png");
+#image-buy-green {
+    -fx-image: url("../../images/buy_green.png");
 }
 
 #image-sell-white {
     -fx-image: url("../../images/sell_white.png");
 }
 
+#image-sell-red {
+    -fx-image: url("../../images/sell_red.png");
+}
+
 #image-expand {
     -fx-image: url("../../images/expand.png");
 }
@@ -53,14 +53,6 @@
     -fx-image: url("../../images/collapse.png");
 }
 
-#image-buy-large {
-    -fx-image: url("../../images/buy_large.png");
-}
-
-#image-sell-large {
-    -fx-image: url("../../images/sell_large.png");
-}
-
 /* navigation buttons */
 #image-nav-market {
     -fx-image: url("../../images/nav/market.png");

desktop/src/main/java/bisq/desktop/main/offer/MutableOfferView.java

@@ -309,12 +309,10 @@ public abstract class MutableOfferView<M extends MutableOfferViewModel> extends
 
             placeOfferButton.setId("buy-button-big");
             placeOfferButton.updateText(Res.get("createOffer.placeOfferButton", Res.get("shared.buy")));
-            nextButton.setId("buy-button");
             percentagePriceDescription.setText(Res.get("shared.belowInPercent"));
         } else {
             placeOfferButton.setId("sell-button-big");
             placeOfferButton.updateText(Res.get("createOffer.placeOfferButton", Res.get("shared.sell")));
-            nextButton.setId("sell-button");
             percentagePriceDescription.setText(Res.get("shared.aboveInPercent"));
         }
 

desktop/src/main/java/bisq/desktop/main/offer/offerbook/OfferBookView.java

@@ -356,7 +356,6 @@ public class OfferBookView extends ActivatableViewAndModel<GridPane, OfferBookVi
         createOfferButton.setGraphic(iconView);
         iconView.setId(direction == OfferPayload.Direction.SELL ? "image-sell-white" : "image-buy-white");
         createOfferButton.setId(direction == OfferPayload.Direction.SELL ? "sell-button-big" : "buy-button-big");
-
         setDirectionTitles();
     }
 
@@ -861,13 +860,12 @@ public class OfferBookView extends ActivatableViewAndModel<GridPane, OfferBookVi
                                         iconView.setId("image-remove");
                                         title = Res.get("shared.remove");
                                         button.setId("cancel-button");
-                                        button.setStyle("-fx-text-fill: #444;"); // does not take the font colors sometimes from the style
                                         button.setOnAction(e -> onRemoveOpenOffer(offer));
                                     } else {
                                         boolean isSellOffer = offer.getDirection() == OfferPayload.Direction.SELL;
                                         iconView.setId(isSellOffer ? "image-buy-white" : "image-sell-white");
+
                                         button.setId(isSellOffer ? "buy-button" : "sell-button");
-                                        button.setStyle("-fx-text-fill: white;"); // does not take the font colors sometimes from the style
                                         title = Res.get("offerbook.takeOffer");
                                         button.setTooltip(new Tooltip(Res.get("offerbook.takeOfferButton.tooltip", model.getDirectionLabelTooltip(offer))));
                                         button.setOnAction(e -> onTakeOffer(offer));