Per-step recording and editing of mod-wheel

[fferri]

While continuous recording of mod-wheel/pitch-bend motion seems impossible, perhaps a simpler *per-step* editing and recording of the mod-wheel is more realistic.

This should not be too difficult to implement, doesn't consume much memory, integrates well with step editing, and still fits the KSP UI very nicely (it just needs to update the mod-wheel led strip when editing steps).

[Wound]

I second this. Especially I would like to have recorded or edited modulation be output as CV. If continuous modulation cannot be saved, the a step-wise modulation with a glide option would probably help.