[gnome-music] (6 commits) Non-fast-forward update to branch wip/jfelder/mpris-handle-tracklist-changes

[Jean Felder <jfelder src gnome org>]

The branch 'wip/jfelder/mpris-handle-tracklist-changes' was changed in a way that was not a fast-forward 
update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  ffebffd... mpris: Listen to the changes on the player playlist
  b7b7bd1... mpris: Emit TrackListReplaced signal when tracklist size ch
  8b783d3... mpris: Rename update_songs_list to update_tracklist

Commits added to the branch:

  d50d783... albumsview: Load covers on demand (*)
  2974019... albumsview: Clarify widget naming (*)
  e23793c... albumsview: Re-add timeout based cover loading (*)
  a65f443... mpris: Listen to the changes on the player playlist
  6dee137... mpris: Emit TrackListReplaced signal when tracklist size ch
  93cd2bb... mpris: Rename update_songs_list to update_tracklist

(*) This commit already existed in another branch; no separate mail sent