make ripple touch events passive

[xomaczar]

Improves scrolling and fixes warnings

[Subtletree]

closes #870, maybe closes #843

Good catch with the feature detection 👍. Looks like we might need:

let options = supportsPassiveEventListeners ? { passive: true } : false;

instead of the empty object https://github.com/WICG/EventListenerOptions/blob/gh-pages/explainer.md#feature-detection

Could add the same treatment to the paper-tooltip listener too

[xomaczar]

@Subtletree thanks for the code review, sorry I did not see that there was an open PR handling similar use case already. I've updated my PR with your suggestions.

[xomaczar]

^ @miguelcobain

[miguelcobain]

Indeed, the feature detection is needed to correctly use passive events.
Thank you both @xomaczar and @Subtletree.