Bad sorting of elements in qrc file tree

1. Open declarative-music-browser example from an old Qt4 SDK (Examples\QtMobility\declarative-music-browser\declarative-music-browser.pro)
2. Expand the qrc file in the Projects view.
   You'll see this:
   
   This looks chaotic to me. I think the files should be sorted by their folder/prefix first. You might even use subfolders in the tree to arrange the files.

Found using Squish test tst_session_handling.