[gnome-music] (17 commits) Non-fast-forward update to branch wip/jfelder/artistsview-selection

[Jean Felder <jfelder src gnome org>]

The branch 'wip/jfelder/artistsview-selection' 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:

  71bc8bb... artistsview: Select songs instead of artists
  343fd59... artisttile: Remove selection-mode logic
  62fca2e... artistalbumswidget: Remove selection-mode-allowed logic
  7e7d82a... disclistbox: Simplify selection-mode property getter and se
  8375269... artistalbumwidget: Add missing docstring
  910bc70... artistalbumswidget: Add missing docstring

Commits added to the branch:

  bcb2967... grltrackerplaylists: Reset count when all songs are removed (*)
  4d6b18f... grltrackerplaylists: Do not bind selected property (*)
  8cf4f0e... grltrackerplaylists: Do not bind validation property (*)
  5fda871... grltrackerplaylists: Make state property binding unidirecti (*)
  8526492... artistalbumswidget: Add margin at the bottom of the widget (*)
  6028f85... artistalbumswidget: Reduce the top margin (*)
  b882625... playlistswidget: Add margin at the bottom of the list (*)
  291794d... albumwidget: Correctly align non square cover images (*)
  1b65494... albumwidget: Reduce top and bottom margins (*)
  471e269... coremodel: Rename _model to _songs_model (*)
  e22d66e... grltrackerwrapper: Rename _model to _songs_model (*)
  38f968d... artistsview: Select songs instead of artists
  fda51f6... artisttile: Remove selection-mode logic
  473ece6... artistalbumswidget: Remove selection-mode-allowed logic
  a11361b... disclistbox: Simplify selection-mode property getter and se
  5953c3e... artistalbumwidget: Add missing docstring
  57dadd2... artistalbumswidget: Add missing docstring

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