New extras - Use CV clock out as gate out

[RadekPilich]

This would be useful to for example trigger external filter envelopes from a midi keyboard being used to play a synth routed through that filter. 

Would implement that as new EXTRAS screen with selection for MIDI input and MIDI channel + electric properties of the CV signal.

[midiavelli]

+1 great idea and exactly what i wanted to ask here:
How do you play hardware synths via mrcc and at the same time trigger Eurorack filters and Envelopes through which you send those hardware synths

Your idea would be an elegant solution!