[gnome-music] (5 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:

  55d8bc7... artistsview: Select songs instead of artists
  deefaec... artisttile: Remove selection-mode logic

Commits added to the branch:

  d892306... grltrackerwrapper: Add a source setter (*)
  d7425fa... coregrilo: Replace tracker source if the plugin is already  (*)
  11f7969... coregrilo: Properly load tracker plugin (*)
  8c54880... artistsview: Select songs instead of artists
  3d85506... artisttile: Remove selection-mode logic

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