(Touch) Scroll-factor per app

[sommerper]

I just noticed that we can now use per app scroll-factor which is really awesome. I'm already using it and it works well.

It made me think that I could also use a specific setting just for Touchkpads per app.

In Godot my mouse scrolls just fine but using the trackpad it scrolls like I have set the scroll-factor to 1000 or something. But in the browser the touchpad scrolls normally.

In fact something that would be really cool is being able to nest configs like this:

window-rule {
    match app-id=r#"^godot$"#
    touchpad {
        tap
        natural-scroll
        scroll-factor 0.01
    }
    mouse {
        // natural-scroll
        accel-speed 0.3
        accel-profile "adaptive"
        scroll-factor 1.5
    }
}

But maybe that's too much to ask for. ;)
Anyway, thanks for your hard work!

[YaLTeR]

Hm. We could probably do a separate touchpad scroll factor. Not any of the other settings though since they're global device settings handled by libinput.