Drastic increase in scroll sensitivity

[DanielHZhang]

VS Code version: Code - Insiders 1.30.0-insider (ebe9ea8, 2018-11-19T20:06:37.217Z)
OS version: Windows_NT x64 10.0.17134

Steps to Reproduce:

1. Scroll through editor with mouse wheel or trackpad

New insiders update:
http://recordit.co/ADG2ROVHhb
A single mouse wheel tick scrolls from line 1 to line 48, even when the screen can only show 27 lines (prevents you from accessing certain portions of code via scrolling).

1.29.1:
http://recordit.co/GsO5GwN9Uu
A single mouse wheel tick scrolls from line 1 to line 7.

The mouse wheel sensitivity seems to be affected by the "vertical scrolling number of lines" setting in Windows (found here: https://gyazo.com/88527f95f57a0034b5fd682b23586ff3)
The increase in scroll sensitivity can be noticed with trackpad scrolling as well.

Does this issue occur when all extensions are disabled?: Yes

[vscodebot]

(Experimental duplicate detection)
Thanks for submitting this issue. Please also check if it is already covered by an existing one, like:

• Mouse Wheel Scrolling Ignores Mouse Control Panel Settings (#7640)
• Always scroll a complete line (#50624)
• Request: mouse wheel scroll sensitivity setting for the explorer (#47230)
• Mouse wheel to scroll left and right, you can not control the horizontal scroll bar (#38831)