7.3 beta - recursive playlist folders.

[Vim_Fuego]

I noticed that playlist folders are no longer recursive. This matches the documentation, bit some media libraries may rely on there being m3u files in directories (emg. Compilation albums).

It would be nice to be able to control this behaviour selectively. So an "Add Folder" and "Add Recursive Folders" button. So it's possible to have a mix of old and new behaviour.