Jean Felder authored Apr 15, 2019 and Jean Felder committed May 31, 2019

The playlists interface from MPRIS has a method (ActivatePlaylist) to
select and play a playlist. This method directly calls the
"activate_playlist" method from PlaylistView. This is a bad design as
MPRIS should not directly interact with a view.

This is fixed by adding an "activate-playlist" signal to the
Playlists. Then, PlaylistView listens to this signal in order to
update the view and start the playlist accordingly.