This hotfix release fixes the "Content not available" error: YouTube videos can now be played again!

It also fixes a few bugs introduced in 0.28.1:
• Playlist items dragging to only neighbour positions
• Title/comments flickering between current and previous video
• "Start main player in fullscreen" option not working

Other improvements:
• [YouTube] Allow rewinding livestreams up to 4 hours again
• Don't load livestream video when playing in background
• New UI for "Remove watched"
