Favorites: feature for nesting folders was removed -- please undo this decision!

Surely there was a good technical reason that v0.1.5 no longer supports nested folders in the Favorites.
But from a user's point of view, the step that not even one level of nesting isn't possible anymore, looks too radical.

-- At least one level of nesting should be possible:
Folders in folders.

An additional second level of nesting (folders in folders in folders) would be very welcome, but if I had to, I could manage to live without this second level.
But I consider at lest one level of nesting as "necessary"; it should become supported again.