[gnome-music] (25 commits) Non-fast-forward update to branch wip/jfelder/mpris-cleanup

[Jean Felder <jfelder src gnome org>]

The branch 'wip/jfelder/mpris-cleanup' 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:

  53a9919... mpris: Only set trackNumber metadata when it's available
  d942297... mpris: Remove unecessary return from GoTo method
  dc94ed3... mpris: Add newline to _get_active_playlist docstring
  ae82f8e... mpris: Reorder imports
  9e45488... mpris: Rename Server class to DBusInterface
  54b8c4c... mpris: PEP-8 fixes on the DBusInterface class
  b4cc117... mpris: Fix codestyle on the DBusInterface class
  1683b2b... mpris: Rename MediaPlayer2Service class to MPRIS
  dcf1f57... mpris: Fix xml description indentation
  9f5de4d... mpris: Make docstring quotation mark consistent
  eeb32c3... mpris: Add PropertiesChanged signal to xml description
  ff1925a... mpris: Simplify query playlists logic
  fa47012... mpris: Cleanup SetPosition method
  fdc7598... mpris: Remove unused signals from the TrackList interface
  09f66ab... mpris: Change naming convention to snake_case
  70fdbc0... mpris: Move dbus connection logic to DBusInterface
  c64f9ea... mpris: Asynchronously connect to session bus
  8ede999... mpris: Handle signals emissions internally
  2f4daee... mpris: Make app attribute internal
  a4a2eb6... mpris: Make player attribute internal
  91a6e83... mpris: Add doctring for all MPRIS methods
  7d83db0... mpris: Fix some PEP-8 issues
  a8b98dd... CI: Remove mpris.py from flake8 ignored files
  dae7c10... mpris: Update copyright information

Commits added to the branch:

  6d89631... app: Use gtk_window_present for activation (*)
  065c5e5... mpris: Only set trackNumber metadata when it's available
  d392398... mpris: Remove unecessary return from GoTo method
  6d7eaae... mpris: Add newline to _get_active_playlist docstring
  be6f0c4... mpris: Reorder imports
  6b3c980... mpris: Rename Server class to DBusInterface
  d1c80e1... mpris: PEP-8 fixes on the DBusInterface class
  f908c34... mpris: Fix codestyle on the DBusInterface class
  123a3a6... mpris: Rename MediaPlayer2Service class to MPRIS
  a2d4247... mpris: Fix xml description indentation
  8189447... mpris: Make docstring quotation mark consistent
  e69a47a... mpris: Add PropertiesChanged signal to xml description
  1e0ce15... mpris: Simplify query playlists logic
  5a99add... mpris: Cleanup SetPosition method
  4b2b786... mpris: Remove unused signals from the TrackList interface
  7b0402e... mpris: Change naming convention to snake_case
  f116bcb... mpris: Move dbus connection logic to DBusInterface
  b38af70... mpris: Asynchronously connect to session bus
  e0d2898... mpris: Handle signals emissions internally
  c6bfc7e... mpris: Make app attribute internal
  871f623... mpris: Make player attribute internal
  8cd49e7... mpris: Add doctring for all MPRIS methods
  c38ece8... mpris: Fix some PEP-8 issues
  8266f50... CI: Remove mpris.py from flake8 ignored files
  8beba49... mpris: Update copyright information

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