Fix wallet selector size adjustment

src/qt/bitcoingui.cpp

@@ -485,6 +485,7 @@ void BitcoinGUI::createToolBars()
         toolbar->addWidget(spacer);
 
         m_wallet_selector = new QComboBox();
+        m_wallet_selector->setSizeAdjustPolicy(QComboBox::AdjustToContents);
         connect(m_wallet_selector, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, &BitcoinGUI::setCurrentWalletBySelectorIndex);
 
         m_wallet_selector_label = new QLabel();

src/qt/forms/debugwindow.ui

@@ -453,6 +453,9 @@
          </item>
          <item>
           <widget class="QComboBox" name="WalletSelector">
+           <property name="sizeAdjustPolicy">
+            <enum>QComboBox::AdjustToContents</enum>
+           </property>
            <item>
             <property name="text">
              <string>(none)</string>