Scrolling can be improved

Issue Type: <b>Feature Request</b> when some of my file's size grows when I'm developing, then it becomes more and more hard to scroll. Little scrolling drag shifts code in screen very large amount up or down, but sometimes I want it to shift only little bit. This is convenient to do if file contains about under 2000 rows but becomes more and more inconvenient as rows amount grow. There can be nice solution for that: if holding down Ctrl key while dragging scrollbar button with mouse, then code in screen moves more slowly. It would be most nice when i move cursor with mouse about 200 pixels up while dragging. then code in screen moves down about 30 rows. (Mouse cursor and scrollbar button doesn't need to stay in one place - when cursor moves example 200px up, then scrollbar button can move example only 50px up) Thank you :) I love this program :) VS Code version: Code 1.36.0 (0f3794b38477eea13fb47fbe15a42798e6129338, 2019-07-03T13:25:46.372Z) OS version: Windows_NT x64 6.1.7601 <!-- generated by issue reporter -->