[REG 4.2 -> 4.3] Lots of duplicate files in Projects view

1. Have a source checkout of Qt Creator v4.2.2.
2. Open the project file qtcreator.pro in Creator.
3. Wait for project parsing to finish.
4. Show the Projects view.
5. Expand qtcreator / share / static
6. Compare the files you find in "Sources" to those you find in "Other files".
   Lots if not all of them are duplicated.

I think each file should be show in only one of these categories.

Found using Squish test tst_openqt_creator