Virtual steps on knobs

Add a ‘steps’ parameter so we can make some knobs steppy. Useful for Marbles length parameter for example.
MetaModuleSteps

i also think this would be really useful- or so way for us to draw a curve. with the 4ms DLD looping delay, im finding that mapping an mm knob to either the reverse or hold buttons, those buttons don’t behave well when turning the mm knob so having a 1 step 0-100% would be useful there (or perhaps i’ve found a bug in the DLD)