Worlds in folders?

I think it would make things a lot easier if we could sort different worlds into folders. For example I could make a folder named 'Mob Traps' and put all my mob traps in that folder, keeping them out of the way!
This would also benefit different players on the same device, for example I could seperate my Player1 worlds and Player2 worlds into different folders, so they don't get mixed up.
Feedback and suggestions are appreciated, as I think this could be a major new feature!

I'm still keen for this feature! It would make it easier to start again, manage your worlds properly and just make things a lot more easy!