[gnome-music] (6 commits) Non-fast-forward update to branch wip/mschraal/coremodel-flatten-search-models

[Marinus Schraal <mschraal src gnome org>]

The branch 'wip/mschraal/coremodel-flatten-search-models' 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:

  6acb003... coremodel: Use flattened wrapper models for all searches
  3f3ac25... grltrackerwrapper: Adapt songs search terminology

Commits added to the branch:

  dc81992... grltrackerwrapper: Ignore redundant delete events (*)
  4667eee... albumwidget: Fix selection checkboxes style (*)
  738bd38... coremodel: Use flattened wrapper models for all searches
  f0f599d... coremodel: Cleanup signal id handling
  deb0df2... coremodel: Add static type annotations
  b00fb27... grltrackerwrapper: Adapt songs search terminology

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