Fix padding on toolbuttons with menu button popup

Fixes #795

src/collection/collectionfilterwidget.ui

@@ -38,6 +38,11 @@
    </item>
    <item>
     <widget class="QToolButton" name="options">
+     <property name="styleSheet">
+      <string notr="true">QToolButton, QToolButton:hover, QToolButton:pressed {
+  padding-right: 16px;
+}</string>
+     </property>
      <property name="iconSize">
       <size>
        <width>16</width>
@@ -45,7 +50,10 @@
       </size>
      </property>
      <property name="popupMode">
-      <enum>QToolButton::InstantPopup</enum>
+      <enum>QToolButton::MenuButtonPopup</enum>
+     </property>
+     <property name="autoRaise">
+      <bool>true</bool>
      </property>
     </widget>
    </item>

src/core/mainwindow.ui

@@ -151,6 +151,12 @@
                   <property name="enabled">
                    <bool>false</bool>
                   </property>
+                  <property name="styleSheet">
+                   <string notr="true">QToolButton, QToolButton:hover, QToolButton:pressed {
+  padding-right: 16px;
+}
+</string>
+                  </property>
                   <property name="iconSize">
                    <size>
                     <width>32</width>

src/covermanager/albumcovermanager.ui

@@ -87,6 +87,11 @@
           </item>
           <item>
            <widget class="QToolButton" name="view">
+            <property name="styleSheet">
+             <string notr="true">QToolButton, QToolButton:hover, QToolButton:pressed {
+  padding-right: 16px;
+}</string>
+            </property>
             <property name="text">
              <string>View</string>
             </property>

src/internet/internetsearchview.ui

@@ -54,6 +54,12 @@
               <height>0</height>
              </size>
             </property>
+            <property name="styleSheet">
+             <string notr="true">QToolButton, QToolButton:hover, QToolButton:pressed {
+  padding-right: 16px;
+}
+</string>
+            </property>
             <property name="iconSize">
              <size>
               <width>16</width>
@@ -61,7 +67,7 @@
              </size>
             </property>
             <property name="popupMode">
-             <enum>QToolButton::InstantPopup</enum>
+             <enum>QToolButton::MenuButtonPopup</enum>
             </property>
             <property name="autoRaise">
              <bool>true</bool>
@@ -231,7 +237,7 @@
             <x>0</x>
             <y>0</y>
             <width>398</width>
-            <height>518</height>
+            <height>520</height>
            </rect>
           </property>
           <layout class="QVBoxLayout" name="verticalLayout_5">