Use Gnome button layout for OSX - otherwise user buttons and apply are on the left???


git-svn-id: http://cantata.googlecode.com/svn/trunk@5350 b1e49159-3266-923f-9c3e-04f16369770a
Only show icons on buttons if applicable to style


git-svn-id: http://cantata.googlecode.com/svn/trunk@5351 b1e49159-3266-923f-9c3e-04f16369770a