Revert a few things

Namely:

Revert "Selectively restore non-stupid parts of stuff we had"

This reverts commit e7f9add780695f165684ef345f31cfd853366231.

Revert "Scroll: modified velocitytracker"

This reverts commit 4123865f4d08fc80c1aa8afea9aca1b6f2b685ad.

Revert "fix cursor leaks in F_B"

This reverts commit e154a2577d84acf27ec2c56f5867eb07aae2b6c3.