Fix KDE config group loading


git-svn-id: http://cantata.googlecode.com/svn/trunk@4405 b1e49159-3266-923f-9c3e-04f16369770a
Use a sparate thread for communications with tag helper.


git-svn-id: http://cantata.googlecode.com/svn/trunk@4406 b1e49159-3266-923f-9c3e-04f16369770a