Fix sort order in sound picker

Apparently I missed the sound picker when I fixed the project view
sorting.
Remove more Thumbs.db files from repo

I think I got them all this time!
Merge https://github.com/Radnen/spherestudio

Conflicts:
	SoundTestPlugin/SoundPicker.cs
Merge pull request #16 from fatcerberus/master

Using LINQ to populate sound picker