rework "add to playlist"

"Add to playlist" opens the popup "Select a playlist" but it doesn't indicate in which playlist the song is already in. It also doesn't let me add the song to multiple playlists.

Current state:

Change/Feature request:

Please add an indicator next to playlists that shows which playlists already includes the song.

And let us add the song to multiple playlists.

Example:

Here I can easily see by the green checkmark, that the song is in two playlists. And I can add the song to multiple other playlists if I want.

Currently the little popup on deezer already tells me if the song is in certain playlist. But it only pops up AFTER selecting the playlist.

This is sweet but not enough:

(I'm aware that this feature has been requested few times but those are 7 years old and it hasn't been improved good enough)