Undo/redo done for music library. Issue: 64
Undo/redo done for music library.
Issue: 64


git-svn-id: 710bf7efd0cb1e604ce28c2b3b9a8b7b2cd2e39e@225 de0ceee1-c12a-0410-b4aa-b6e97b09e4b8

hgabor/kfirpgcreator,hgabor/kfirpgcreator,hgabor/kfirpgcreator