Adding a PAFL ganging link option

It would be great to be able to link PAFL on Gang’d inputs. I often use gangs on stereo sources instead of changing to a stereo input and I only put my left channel in the layers to avoid crowding with faders, soloing that only plays through my left ear when listening to sources and it would be great to be able to gang PAFL to smooth out even more the use of gangs.

A&H needs to add preamp gain and HPF to the gangable attributes.