[gnome-music] (5 commits) Non-fast-forward update to branch wip/jfelder/simplify-playlistdialog

[Jean Felder <jfelder src gnome org>]

The branch 'wip/jfelder/simplify-playlistdialog' 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:

  ec0ffb7... grilo: Add function to populate user playlists
  982f676... playlistdialog: Do not retrieve static playlists
  27b54a4... grilo: Remove unused method playlists_available

Commits added to the branch:

  078a3d4... CI: Simplify and use flake8 (*)
  a5535cc... playlistdialog: Do not show stack at init
  d08567b... grilo: Add function to populate user playlists
  40cdffd... playlistdialog: Do not retrieve smart playlists
  c9f5126... grilo: Remove unused method playlists_available

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