Github user sanjaydasgupta commented on the issue:
https://github.com/apache/zeppelin/pull/3013
Thanks for the ideas @Tagar
If we focus on long term advantages and stability, then continuing to
maintain the old button will be a disadvantage. If the old button is retained,
it will have to be revisited (implement, test, document) every time the
[ui-grid](http://ui-grid.info/) menu adds a new feature or changes an existing
feature. This is clearly not desirable, and should not be our choice of the way
forward.
I had offered to provide a transition mechanism based on a visually similar
button, but just as a transition mechanism - to be removed in 1 or 2 releases.
The ui-grid already has some nice features (like PDF output) that zeppelin
users have requested, and going with ui-grid will IMHO be a good decision.
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