* Guess at trackpad pans on web
* Add test
* Update comment
* Handle macOS accelerated scroll wheel
* Fix test after last commit
* Disable on firefox
* Pull out _isTrackpadEvent and add doc links
* Fix issue with floating point / integer conversion error.
* Workaround for magic mouse events which happen to be divisible by 120.
* Refactor to handle bad luck in accelerated mouse deltas.
Basically, bias towards choosing mouse, but if timestamps are available,
we can check the previous event and ensure that false-mouses are avoided.
* Use 120 wheelDelta to identify mouse-accelerated events instead of 240
Apparently some high-precision mice use 120 instead of 240 as the
wheelDelta per tick.
* Handle multiple bad-luck events in a row.
Also fix setting of timeStamp in test.
* Cleanup parameters
9232ccb480