[gnome-music] (6 commits) Non-fast-forward update to branch wip/jfelder/player-ui-logic-separation

[Jean Felder <jfelder src gnome org>]

The branch 'wip/jfelder/player-ui-logic-separation' 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:

  e598e7d... player: Merge two redundant signals
  fb06a79... player: Rename play_previous/next to previous/next
  704b922... player: Refactor SelectionToolbar
  56317de... player: Factor out player ui
  1bb9d86... playertoolbar: Use Gtk.Template

Commits added to the branch:

  09b2a5e... views: Fix notifications_popup calls on startup (*)
  bbabe1b... player: Merge two redundant signals
  d39e9ce... player: Rename play_previous/next to previous/next
  09a04b6... player: Refactor SelectionToolbar
  c43727b... player: Factor out player ui
  b4b9e30... playertoolbar: Use Gtk.Template

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