Github user 1ambda commented on the issue:
https://github.com/apache/zeppelin/pull/2356
@Leemoonsoo I did some experiments to revert the original layout while
keeping highlights. But I think it takes a time to fix. So here are few
options.
(A) revert 2356 and then reimplement the highlighting line feature
considering original layout later.
(B) keep current layout and refine designs so that new layout goes along
with other components.
And #2386 is for `(B)` while fixing some bugs. Could you consider `B` as
well?

---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---