[gnome-music] (29 commits) Non-fast-forward update to branch wip/mschraal/gapless-v3

[Marinus Schraal <mschraal src gnome org>]

The branch 'wip/mschraal/gapless-v3' 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:

  adf7062... gstplayer: Enable gapless playback
  d8bb5d3... playertoolbar: Reset progress time on update
  29b0c69... playertoolbar: Minor docstring clarification

Commits added to the branch:

  058c694... Update Greek translation (*)
  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 (*)
  1eaff88... gstplayer: Enable gapless playback
  40dd644... playertoolbar: Reset progress time on update
  b093761... playertoolbar: Minor docstring clarification

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