Secondary [Shift] + [+%] and [Shift] + [-%] value

When utilizing [+%] and [-%], having a second customizable value can be helpful for finer control.

For instance:
[+%] = +10% intensity. (customizable)
[-%] = -10% intensity.

[Shift] + [+%] = +3% intensity (customizable)

[Shift] + [-%] = -3% intensity


Why?
- Having a second value allows for more granular control when making quick adjustments.

Sometimes 10% (or whatever you define) isn't fine enough for quickly achieving desired intensities.

Other Notes
- The secondary value trigger key could be a different key other than [shift] + [+%] ie: [/] + [+%].

     - the default keyboard shortcut for [+%] is [ctrl] + [alt] + [+ / -], which should allow this to work with [ctrl] + [alt] + [shift] + [+ / -]. (unless windows / mac has interrupts for this key sequence)