Make the Tap-Tempo switch assignable as Expression or Volume Boost

[DiffractionCircuit]

There is already a request to reassign footswitches:

Footswitch functions to the next level! List of important upgrades

I made a list of most crucial footswitch function updates that the Quad Cortex needs. Please give this your vote if you agree and also share your ideas if you have further ones. Since hybrid mode for presets/scenes/stomps is already confirmed I have not listed it. Assign any parameter changes to any footswitch in stomp mode Add push and hold -function to stomp and scene modes. In stomp mode: Ability to assign everything to press-and-hold that one can assign to regular press-function. In scene …