Add option to only act on songs that pass current string or genre filter.
BUG: 473


git-svn-id: http://cantata.googlecode.com/svn/trunk@4737 b1e49159-3266-923f-9c3e-04f16369770a
Fix more 'Genres'


git-svn-id: http://cantata.googlecode.com/svn/trunk@4738 b1e49159-3266-923f-9c3e-04f16369770a
Fix 'missing' search action icon


git-svn-id: http://cantata.googlecode.com/svn/trunk@4739 b1e49159-3266-923f-9c3e-04f16369770a