Don't apply reverse scrolling to mice wheels

[korylprince]

This is a fix for #1140.

Currently reverse-scrolling is applied globally. This can be annoying for those who use both a mouse and touchpad with "natural scrolling". In the case of scrolling to adjust volume, brightness, etc, scrolling up on a touchpad feels "natural" to adjust those things up.

However, this is the opposite of what "natural scrolling" does because it was designed for scrolling documents, which does feel natural to reverse up/down.

So what this means for Waybar is that if we leave reverse-scrolling = false, the mouse wheel feels natural, but the touchpad feels backwards. If we set reverse-scrolling = true, the touchpad feels natural, but the mouse wheel feels backwards.

This PR does two things to address this issue:

• Fixes a regression introduced in Lift reverse-scrolling option into AModule #2232 that prevents reverse-scrolling from being applied on smooth scroll events (e.g. most touchpad events)
• Disables reverse-scrolling on mouse wheel scroll events, even if reverse-scrolling = true

I can't see any good reason someone would want to apply "natural scrolling" to a mouse wheel. If you are concerned that someone might, I could refactor this to have independent reverse-mouse-scrolling and reverse-touchpad-scrolling config options, keeping the existing reverse-scrolling as a global option.

[Alexays]

LGTM

[Alexays]

Maybe we should add another option to force reverse ?

[korylprince]

I added a commit that adds reverse-mouse-scrolling, so that reverse scrolling can be independently enabled for mice scroll wheels. Does that work?

I can also update the wiki once approved.

Edit: I know that's not exactly what you asked for, but if we have to add a new option anyways, this way it's a little more configurable. reverse-mouse-scrolling enables it for mice even if reverse-scrolling isn't enabled.

[Alexays]

Perfect!

[korylprince]

The Backlight and PulseAudio wiki pages have been updated to reflect the changes in this PR.