[gnome-music] (18 commits) Non-fast-forward update to branch wip/mschraal/core-thumb-property

[Marinus Schraal <mschraal src gnome org>]

The branch 'wip/mschraal/core-thumb-property' 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:

  cb5766f... coreartist: Rework retrieval
  846053c... artistart: Split out retrieval and cache storage
  dcb1077... artcache: Unify DefaultIcon and _make_icon_frame
  c03e51f... artistartstack: Disconnect cache callback
  f5a4f55... artistartstack: Remove DefaultIcon use
  69759bd... artistartstack: Remove unused variable
  16d1471... artstack: Renamed from ArtistArtStack
  0a7ed43... artstack: Add default size setter
  ad41ee5... corealbum: Add thumbnail property
  bfb5ecb... Rename StoreArtist to StoreArt
  ddf5b6b... Restore embedded art support
  3609a06... artstack: Disconnect notification on coreobject change
  6e82e6a... coresong: Add thumbnail property
  8aec1da... mpris: Use CoreSong thumbnail property
  531e6ad... utils: Add ArtSize enum
  fb59496... Remove coverstack.py and albumartcache.py
  4a78f90... grltrackerwrapper: Clarify function name
  1e98f73... grltrackerwrapper: Consolidate art queries

Commits added to the branch:

  5bc9a5e... coreartist: Rework retrieval
  225995b... artistart: Split out retrieval and cache storage
  0c11667... artcache: Unify DefaultIcon and _make_icon_frame
  87b962b... artistartstack: Disconnect cache callback
  dc0a5ac... artistartstack: Remove DefaultIcon use
  25cd007... artistartstack: Remove unused variable
  c490e5f... artstack: Renamed from ArtistArtStack
  51d59ba... artstack: Add default size setter
  f22f41a... corealbum: Add thumbnail property
  9992267... Rename StoreArtist to StoreArt
  1e00203... Restore embedded art support
  0d3bfad... artstack: Disconnect notification on coreobject change
  0d17ea0... coresong: Add thumbnail property
  73c5190... mpris: Use CoreSong thumbnail property
  9c4a66d... utils: Add ArtSize enum
  eb8cafc... Remove coverstack.py and albumartcache.py
  765bebf... grltrackerwrapper: Clarify function name
  2bff0d6... grltrackerwrapper: Consolidate art queries