Pin playing playlist

[dtinhvo]

I understand that you can play a playlist by typing out the name and pressing enter, but from this word search I can't pin it to a tab above.
The reason for this feature is that I have a LOT of playlists (so much that a flat list is not navigable), and I can only navigate to relevant ones in a listening session with word search. But then in such a session, I cannot move tracks from a "testing" playlist to a "permanent" playlist, because I cannot pin these playlist tabs to do drag-and-drop . Searching my list of playlists is not practical, due to the number of playlists as explained above.
Alternatively, if anyone knows how to copy/move tracks between playlists with word search (something like currentPlaylist:currentTrack -> wordSearchedPlaylist), please let me know.