[rschiks]

but its not possible to have it like folder structure? when you find a collection set in the movie list, you can then click to go into that folder and display the movie set for that particular collection and when you want to go back, you basically just jump back in the folder structure.

I'm not sure if I understand you correctly but we will find out when you have done some changes and I can play with it

Yes, that would be possible, but it's not as nice when it's really integrated in the view itself.
I was thinking for the other views that if it's a collection, and you click on it, you will get a screen similiar to the movie sets view, but on top of the movie view.