enable envelopes to effect chords

[szeli1]

This pull request adds a new button in the instrument sound shaping menu that makes the envelope apply on a chord instead of single notes.
For example this can be useful when the arpeggio is turned on and the user wants to make the chord notes fade out gradually.

mentioned in #7025.

picture:

[Rossmaxx]

Screen recording pls?

[szeli1]

Screen recording pls?

Added picture in my first comment.
The arpeggio and the new button should be enabled for this to work.

[Rossmaxx]

The lcd button could get a label tho.

[Rossmaxx]

Or i have another idea, what about adding an "arp" option similar to volume, reso, cutoff in the target tab? Wouldn't that be a better implementation?

[szeli1]

The lcd button could get a label tho.

Tested, the description does not fit. It has a SimpleTextFloat description instead.

[szeli1]

Or i have another idea, what about adding an "arp" option similar to volume, reso, cutoff in the target tab? Wouldn't that be a better implementation?

I think it does not work that way. This feature can work separately for each envelope type.
To my understanding the gui is not setup in a way where it would show a new menu instead of the envelope settings. This would be difficult to implement.
I can try implementing it if you want.

[Rossmaxx]

If it's too difficult, better to pass on it. I would recommend you ask opinion from @Spekular who most often has a good opinion on the UX side of things.