Early 2021 clean-up:
- enable/disabled/change subtitles from OSD → implemented
- audio selection from OSD → implemented
- audio sync during playback → implemented (e.g. Plex HTPC, PMP)
- end time in OSD → implemented
- synopsis in OSD → duplicate (e.g. When watching random episodes of tv shows, would be nice to be able to read the description of the episode)
