[gnome-music] (7 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:

  640b0d1... corealbum: Add a model_loaded property
  312e5c5... Handle CoreDisc updates

Commits added to the branch:

  dc81992... grltrackerwrapper: Ignore redundant delete events (*)
  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
  cefe56e... Handle CoreDisc updates

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