This PR adjusts scrolling to be a lot faster on Linux and also makes
terminal scrolling work.
For Wayland, it makes scrolling faster by handling the `AxisValue120`
event (which also allows high-resolution scrolling on supported mice)
On X11, changed the 1 line per scroll to 3.
### Different solutions
I tried replicating Chromium's scrolling behaviour, but it was
inconsistent in X11/Wayland and found it too fast on Wayland. Plus, it
also didn't match VSCode, since it seems that they do something
different.
Release Notes:
- Made scrolling faster on Linux
- Made terminal scroll on Linux
d8e32c3e3c