Cancel intertial scroll when changing between primary/alt screen

[mitchellh]

Discussed in #3838

^{Originally posted by ComplexPlane December 28, 2024}
I noticed that when using a Macbook trackpad's inertial scrolling inside a TUI application, if a scroll is started and then the app is quit right after, the scroll inertia carries over to the scrollback buffer. This happens specifically for me when scrolling up (fingers moving down) in a Lazygit window and then hitting q. This doesn't seem to happen in Kitty so I guess it's preventable?

Ghostty

Screen.Recording.2024-12-28.at.9.19.22.PM.mov

Kitty

Screen.Recording.2024-12-28.at.9.22.58.PM.mov