Pro Tools features

Easier group modification

Add these options when right-clicking a track or a selection of multiple tracks:

- Add to Group > [show group list, highlighting groups already assigned to the track(s)];

- Remove from Group > [show groups currently assigned to this track] – this is greyed out if the track(s) hasn't been assigned to any group.

Opertaing System(s) n/a

Idea No. 492