PointerEvents: update touch-action tests to be more reliable
Merge branch 'submission/Microsoft/PointerEvents-TAUpdates' of https://github.com/InternetExplorer/web-platform-tests into submission/Microsoft/PointerEvents-TAUpdates
Address mbrubeck feedback for #2924
Address @cathychan feedback for #1299
Merge pull request #1299 from InternetExplorer/submission/Microsoft/PointerEvents-TAUpdates

PointerEvents: update touch-action tests to be more reliable; r=mbrubeck,cathychan