Touchscreen detection broken in Chrome 70 (desktop)

[khabraken]

Chrome 70 has disabled the ontouch* APIs on desktop, see https://www.chromestatus.com/feature/4764225348042752

This prevents touchscreen detection (and subsequently functionality) in the leaflet source:

ingress-intel-total-conversion/external/leaflet-src.js

Line 536 in 0fabfb6

var touch = !window.L_NO_TOUCH && !phantomjs && (pointer || 'ontouchstart' in window ||

As per the first link, the appropriate fix should probably be "site should use navigator.maxTouchPoints for touchscreen detection, and Windows.TouchEvent for TouchEvent feature detection".

Alternatively, the 'pointer' variable:

ingress-intel-total-conversion/external/leaflet-src.js

Line 523 in 0fabfb6

pointer = (window.PointerEvent && window.navigator.pointerEnabled) ||

should be updated to match what the most recent leaflet source sets it to:
https://github.com/Leaflet/Leaflet/blob/9fda888df2791ca0df6f182a9d91d393ee49034c/src/core/Browser.js#L95
(navigator.pointerEnabled was deprecated ages ago and was never standard, thus 'pointer' always ends up false)

Further reading:
https://bugs.chromium.org/p/chromium/issues/detail?id=897906