Midibox FM Feature Request (patch programming)

[lazerbeat]

This might be a bit niche but I had a request which might make patch programming easier. Yamaha DX style synths have a feature when you can mute and unmute individual operators while programming patches. This is really handy if you want to for example just work on OP1+2 in F+F etc.

In the OP screen would it be possible to add the following functionality 

With OP selected on OP/INST button

Hold [CFG] + Multiselect button 1 or 2 or 3 or 4 = mute OP 1 or 2 or 3 or 4 -> if op already muted, unmute to pre muted volume

Hold [CFG] + OP/INST button = Unmute all OPs to premuted volume 

Again really sorry if this is a super minor request but it might make programming a bit easier? Thanks!