Add scrollwheel function

[Larsn-Rinnstroem]

I thought about an option to bind a function to the scrollwheel. An usecase would be the volume: simply hover over audioband and scroll to increase or decrease the volume. Maybe another usecase would be forward or backward the current playtime. Sadly Spotify doesn't support the function itself but maybe other players so. Maybe a translation from scrolling the wheel to pressing arrow keys might do the trick in other players

[dsafa]

I think the scrollwheel idea would work. Something like hovering over the volume and scrolling to change it or hovering over the progress bar and scrolling to fast forward. It's going to have to wait for now since I still need to get the volume bar added.