'DOMSubtreeModified' mutation event is deprecated (in assets.js)

[Algorush]

There is a warning message in Dev Tools:
[Deprecation] Listener added for a 'DOMSubtreeModified' mutation event. This event type is deprecated, and will be removed from this browser VERY soon. Usage of this event listener will cause performance issues today, and represents a large risk of imminent site breakage. Consider using MutationObserver instead. See https://chromestatus.com/feature/5083947249172480 for more information.
DOMSubtreeModified is using here:

3dstreet/src/assets.js

Line 345 in afec8fd

document.addEventListener('DOMSubtreeModified', domModifiedHandler, false);

[vincentfretin]

Duplicate of #733