Logic is shared with the timeline blueprints which also have the same
problem of displaying text on top of a combo colour.
Slightly modified the formula. Seems to yield better results on a
subjective check.
For wheel input with precision, we still prefer exact tracking for now.
May change this in the future based on feedback from mappers, but it
makes little sense to do non-snapped scrolling when input is coming from
a non-precise source.