Hi Christian_S, and welcome on this board.
it has been done like this on the easel. even if this is the same slider, we have 2 different parameters. you'll notice also this if you look at the Buchla Easel V's parameters list in a DAW :
you have "COMP OSC PITCH" and "COMP OSC PITCH Q".
same for mod osc.
Maybe you'll agree with me , but IMHO it is not really common use to switch and tweak between absolute and quantized values in real time.
hope it helps,
best,