[gnome-music] (17 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:

  5a93254... artistart: Split out retrieval and cache storage
  5cee3bf... artcache: Unify DefaultIcon and _make_icon_frame
  ed2a96c... artistartstack: Disconnect cache callback
  fea3d28... artistartstack: Remove DefaultIcon use
  66132bd... artistartstack: Remove unused variable
  bdd1a03... artstack: Renamed from ArtistArtStack
  b5fb2ea... artstack: Add default size setter
  45ffca3... corealbum: Add thumbnail property
  d99c48f... Rename StoreArtist to StoreArt
  57f36d6... Restore embedded art support
  af40a80... artstack: Disconnect notification on coreobject change
  eada726... coresong: Add thumbnail property
  44334a6... mpris: Use CoreSong thumbnail property
  66dbe55... utils: Add ArtSize enum
  a737925... Remove coverstack.py and albumartcache.py
  642c328... grltrackerwrapper: Clarify function name
  2594f1a... grltrackerwrapper: Consolidate art queries

Commits added to the branch:

  5be7267... artistart: Split out retrieval and cache storage
  ca6b6bc... artcache: Unify DefaultIcon and _make_icon_frame
  e2a7379... artistartstack: Disconnect cache callback
  7599e95... artistartstack: Remove DefaultIcon use
  6316ee9... artistartstack: Remove unused variable
  2acd5c8... artstack: Renamed from ArtistArtStack
  765f32c... artstack: Add default size setter
  4e88129... corealbum: Add thumbnail property
  e362fff... Rename StoreArtist to StoreArt
  2714f7b... Restore embedded art support
  9eef4b8... artstack: Disconnect notification on coreobject change
  633cf13... coresong: Add thumbnail property
  8a0509d... mpris: Use CoreSong thumbnail property
  13f12d4... utils: Add ArtSize enum
  4f9a3ea... Remove coverstack.py and albumartcache.py
  61799f2... grltrackerwrapper: Clarify function name
  51bfde2... grltrackerwrapper: Consolidate art queries