[gnome-music] (22 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:

  5192d07... coreartist: Rework retrieval
  2ad4c99... artistart: Split out retrieval and cache storage
  b964add... artcache: Unify DefaultIcon and _make_icon_frame
  ae7c692... artistartstack: Disconnect cache callback
  61bd48e... artistartstack: Remove DefaultIcon use
  8dec1e8... artistartstack: Remove unused variable
  8408b97... artstack: Renamed from ArtistArtStack
  b00dcc3... artstack: Add default size setter
  9a8d072... corealbum: Add thumbnail property
  329e19e... Rename StoreArtist to StoreArt
  f94f7b5... Restore embedded art support
  8ee76de... artstack: Disconnect notification on coreobject change
  38f71a4... coresong: Add thumbnail property
  388abbe... mpris: Use CoreSong thumbnail property
  e74569b... utils: Add ArtSize enum
  42657b2... Remove coverstack.py and albumartcache.py
  bf8c5e4... grltrackerwrapper: Clarify function name
  d8d2517... grltrackerwrapper: Consolidate art queries

Commits added to the branch:

  929e6ba... Update Kazakh translation (*)
  687fac8... coremodel: Flatten the core models (*)
  980d5ae... grltrackerwrapper: Do not declare coremodel var classwide (*)
  4eed12c... subprojects: Update shared-modules for Lua improvements (*)
  c5276e3... coreartist: Rework retrieval
  baf882d... artistart: Split out retrieval and cache storage
  6a19122... artcache: Unify DefaultIcon and _make_icon_frame
  de9aefb... artistartstack: Disconnect cache callback
  1e46465... artistartstack: Remove DefaultIcon use
  11a7ae4... artistartstack: Remove unused variable
  393f104... artstack: Renamed from ArtistArtStack
  67f78b7... artstack: Add default size setter
  609ba50... corealbum: Add thumbnail property
  5a68c95... Rename StoreArtist to StoreArt
  a71502b... Restore embedded art support
  bfc006b... artstack: Disconnect notification on coreobject change
  42ffba1... coresong: Add thumbnail property
  a773699... mpris: Use CoreSong thumbnail property
  29ae835... utils: Add ArtSize enum
  6e676b6... Remove coverstack.py and albumartcache.py
  e58bb51... grltrackerwrapper: Clarify function name
  ada5532... grltrackerwrapper: Consolidate art queries

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