Crash fix


git-svn-id: http://cantata.googlecode.com/svn/trunk@4343 b1e49159-3266-923f-9c3e-04f16369770a
Show Music folder in settings dialog accessed from action dialog


git-svn-id: http://cantata.googlecode.com/svn/trunk@4344 b1e49159-3266-923f-9c3e-04f16369770a
Load cached covers in non GUI thread


git-svn-id: http://cantata.googlecode.com/svn/trunk@4345 b1e49159-3266-923f-9c3e-04f16369770a
Fix expand all / collapse all actions. Expand all will only expand 1 level for main browsers.


git-svn-id: http://cantata.googlecode.com/svn/trunk@4346 b1e49159-3266-923f-9c3e-04f16369770a
Locate and load all non cached covers in non GUI thread.


git-svn-id: http://cantata.googlecode.com/svn/trunk@4347 b1e49159-3266-923f-9c3e-04f16369770a