Add field to filter existing playlists in “add to playlist…” dialog
Also:
- Fix the duplicate track add confirmation margins
- Don’t close the duplicate track add confirmation if clicking cancel
- Improve header of add to playlist dialog, making the dialog more compact
Fix #974 (closed) (and maybe reopen #429 (closed)?)
Other improvements idea: https://pad.funkwhale.audio/C00gMaUMQlGufpzJY6uKQQ
Before:
After:
