PlaybackService: Fix shuffle mode at the end of a media playback

Until now the shuffle mode only worked by pressing next.

This fixes will make sure that the shuffle mode is respected on both cases.

Closes #753 (closed)

changed milestone to %3.2.3

changed the description

added 10 commits

• 9e07e6b4...a5476b4f - 8 commits from branch videolan:master
• e443e7c3 - PlaybackService: Empty shuffleStack when set
• 72815897 - PlaybackService: Fix shuffle mode at the end of a media playback

Compare with previous version

merged