Search function when adding a song to playlist
My use case : I listen to random radio on my instance, I hear a song that could be added to a playlist, I click the "add to playlist" button on the player, playlist picker shows up, I have to scroll to find the right playlist.
My request : I would like to be able to filter/search playlists because I have a lot of them.
Side note : it could be nice to be able to add a song to multiple playlist at once. Like being able to select different playlists in the playlist-picker. It might be related to #429 (closed) (which is closed for inactivty but not solved).