[Feature suggestions] Add to one playlist, but hide on others

[Segtendo]

Thought up of a feature that I thought could be super useful.

Say you add a song to a playlist that shares songs. Say I have a Kirby playlist up for the Halberd stage. I drag and drop a song on to there, and the program could ask if you like to have it on all orders, or to add it only to the current order you're editing.

I'd also suggest making it an option and having it default to all orders, as I'm sure people would get annoyed at it popping up every time.