[gnome-music] (12 commits) Non-fast-forward update to branch wip/jfelder/coredisc-updates

[Jean Felder <jfelder src gnome org>]

The branch 'wip/jfelder/coredisc-updates' 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:

  895963c... corealbum: Add a model_loaded property
  b8be6b5... corealbum: Add a flattenlistmodel
  eb2067d... corealbum: Add annotations
  6887605... coreartist: Add a flattenlistmodel
  e6d4b44... coreartist: Add annotations
  dc7b018... Handle CoreDisc updates

Commits added to the branch:

  4667eee... albumwidget: Fix selection checkboxes style (*)
  2edebb0... emptyview: Do not make it visible by default (*)
  d50958a... window: Wait before checking songs availability on launch (*)
  55095d5... utils: Remove unused xlarge in artsize (*)
  d456e33... utils: Remove unused small in artsize (*)
  3e68473... utils: Rename xsmall artsize to small (*)
  a840b69... corealbum: Add a model_loaded property
  864ae69... corealbum: Add a flattenlistmodel
  ab8aeae... corealbum: Add annotations
  41922b6... coreartist: Add a flattenlistmodel
  c9241db... coreartist: Add annotations
  92eeda4... Handle CoreDisc updates

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