[gnome-music] (5 commits) Non-fast-forward update to branch wip/mschraal/albumview-covers-on-demand

[Marinus Schraal <mschraal src gnome org>]

The branch 'wip/mschraal/albumview-covers-on-demand' 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:

  d694171... albumsview: Load covers on demand
  6187eff... albumsview: Clarify widget naming
  06f0562... albumsview: Re-add timeout based cover loading

Commits added to the branch:

  e991a62... grltrackerwrapper: Reuse Core{Album,Artist} on change (*)
  be1d457... coredisc: Remove changed items tracking in CoreDisc (*)
  bb45094... albumsview: Load covers on demand
  0eba5fe... albumsview: Clarify widget naming
  7ddeaff... albumsview: Re-add timeout based cover loading

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