Github user egorklimov commented on the issue:
https://github.com/apache/zeppelin/pull/3078
Seems that in updated `scrollTo()` it's not allowed to pass `undefined `.
Also I found one more error that was fixed after update: keyboard arrows
scrolling works in Firefox, and doesn't work in Chrome:
* Before (anchor doesn't work and when cursor reaches end of current
viewport page doesn't scroll)
Chrome (v67.0.3396.99)

* After
Chrome (v67.0.3396.99)

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