Add playlist to playback
Environment
- Lollypop version: 1.2.35
- GTK+ version: 3.24.20
- Operating system: Fedora 32
Feature
Right now we can only play a single playlist at a time, since the "Play this Playlist" option replaces the playback list. It would be nice to have a "Add this playlist to playback" like we have for tracks. That way we can string different playlists together without going over each track.