Normalize wheel behavior across browsers

[taneliang]

Scrolling/zooming on Firefox was very slow compared to Chrome. This PR fixes it by using some old Facebook code that normalizes the wheel deltas.

Uses https://github.com/facebookarchive/fixed-data-table/blob/master/src/vendor_upstream/dom/normalizeWheel.js. I removed all the stuff that supports legacy wheel events since we can safely target the newest browsers, and the wheel event has been standardized for a long time anyway.

Test Plan

• yarn flow
• yarn start with manual test by scrolling around:
  • Windows + mouse: Chrome and Firefox
  • macOS + trackpad: Chrome, Firefox, Safari

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