Custom scroll animation duration [enhancement]

[alberto-lazari]

Description

It would be very useful to be able to customize the duration of the scrolling animation when smoothness is "high"

Rationale

In my opinion, the animation is a little bit too long and feels sluggish.
The duration when smoothness is "medium" is perfect, but it does not emulate the trackpad.

By providing a simple slider in the settings it could be possible to customize how "snappy" the mouse scroll will feel.
I'm thinking about what Mos does