New action: "Track grouping: Select all tracks in group"

[timlloyd]

As the title says, a new action would be useful:

"Track grouping: Select all tracks in group"

This would simply select all tracks that are grouped to the currently selected track(s).

We currently have actions to select all tracks in group 01-32, but nothing "automatic" like the corresponding item grouping action "Item grouping: Select all items in group".

Would be useful I think

[MusclyArms]

Yes please!