Switch to side-by-side view

--- a/src/qtgui/uiprefs.ui
+++ b/src/qtgui/uiprefs.ui
@@ -647,7 +647,6 @@
   </layout>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
- <pixmapfunction>qPixmapFromMimeSource</pixmapfunction>
  <resources/>
  <connections/>
 </ui>