[gnome-music] (7 commits) Non-fast-forward update to branch wip/mschraal/artrework

[Marinus Schraal <mschraal src gnome org>]

The branch 'wip/mschraal/artrework' 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:

  9372aca... albumartcache: Rework art retrieval
  2e6c734... Move ArtSize into the Art class.
  b697013... albumartcache: Rewrite lookup

Commits added to the branch:

  b74292f... searchview: Remove unused composer field (*)
  fadd962... playlistdialog: Fix minor typo (*)
  9ba51cb... playlistdialog: Drop unused editable property in model (*)
  216480e... playlistdialog: Remove libgd dependency (*)
  af0554c... albumartcache: Rework art retrieval
  c7a9479... Move ArtSize into the Art class.
  2b7e4d9... albumartcache: Rewrite lookup

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