Github user Leemoonsoo commented on the issue:
https://github.com/apache/zeppelin/pull/1983
Thanks @soralee for the fix.
Tested manually and it works well as expected.
LGTM.
Master branch is little bit different from branch-0.7 so i can not apply
this patch to branch-0.7. So, @soralee Can you create separate PR that disables
keyboard shortcut for branch-0.7, too?
So the patch can be included in 0.7.1 release.
It's out of this issue scope, but 'Link this paragraph' is designed to user
embed a paragraph in the website. So i think it's better not having any boarder
or margin.

@soralee what do you think removing border and margin (marked in blue and
red arrow) in a separate issue?
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