message: increase the size of the zoom in/out icons a bit
diff: <property name="text">
  <string notr="true">ZoomIn</string>
  </property>
  + <property name="iconSize">
  + <size>
  + <width>24</width>
  + <height>24</height>
  + </size>
  + </property>
  <property name="popupMode">
  <enum>QToolButton::InstantPopup</enum>
  </property>
  <property name="text">
  <string notr="true">ZoomOut</string>
  </property>
  + <property name="iconSize">
  + <size>
  + <width>24</width>
  + <height>24</height>
  + </size>
  + </property>
  <property name="autoRaise">
  <bool>true</bool>
  </property>
  