Add option to have separate play queue search action.
BUG: 545


git-svn-id: http://cantata.googlecode.com/svn/trunk@5367 b1e49159-3266-923f-9c3e-04f16369770a
Fix play queue centering when track number column is hidden.


git-svn-id: http://cantata.googlecode.com/svn/trunk@5368 b1e49159-3266-923f-9c3e-04f16369770a