In 5.9, a button for descriptions was added to the control bar and in 5.10 a button for audio tracks. Unlike their chapter, captions, subtitle counterparts these were not hidden by the adaptive classes.
Add these new buttons to the list of buttons hidden in smaller form factor layouts.
This fixes #3308
Adaptive classes were misisng audio and descriptions
The buttons for descriptions and audio tracks were recently added, but
not yet hidden by the adaptive classes, as their siblings chapters,
subtitles etc are.
Thanks @hartman, LGTM.
@hartman Add descriptions and audio button to adaptive classes. closes …