[Feature request] Playlist Folders

[bukasem]

Checklist (Your issue will be automatically closed if you delete this part)

• I make sure that there are no existing issues - open or closed - which I could contribute my information to.

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** Description

• the basic idea is to have a folder where I can group all of my study playlists for example or the playlists related to a specific game. The idea is pretty self explanatory.

[InfinityLoop1308]

Won't fix since it requires a big rewrite.