Merge branch 'mpris_wrong_order' into 'master'

Ignore dbus playlist sorting order via dbus if not supported

See merge request sublime-music/sublime-music!75

sublime_music/app.py

@@ -474,6 +474,7 @@ class SublimeMusicApp(Gtk.Application):
                 "Created": lambda p: p.created,
                 "Modified": lambda p: p.changed,
             }
+            if order in sorters:
                 playlists.sort(
                     key=sorters.get(order, lambda p: p),
                     reverse=reverse_order,