HW Acceleration indicator

It would be great to implement an indicator in UI to show whether the playing video has HW acceleration or is playing in SW mode. Also a menu or info dialog on settings to show formats which has HW acceleration supporting on device.

added VLC core feature labels

marked #108 (closed) as a duplicate of this issue

marked this issue as related to #108 (closed)

Depends on vlc#21997

changed milestone to %4.0