Github user AhyoungRyu commented on the issue:
https://github.com/apache/zeppelin/pull/1730
@tae-jun Nice feature indeed!
Most of cases are working like a charm.
But as @marchpig said above,

is this intended result? I removed the `note1` and `note2` separately, and
the time stamped only for latter one: `NoteDirB/note2`.
And another really minor thing is

As you can see there are two trash can icons and their sizes are different
now. Hmm.. so I would suggest you to use another icon for `Empty trash`(not
sure which one will be proper for this..kk) since the trash can icon is already
used for `Move note to trash` / `Move folder to trash` / `Remove note
permanently` / `Remove folder permanently`.
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