GitHub user prabhjyotsingh opened a pull request:
https://github.com/apache/zeppelin/pull/3152
[ZEPPELIN-3736] Helium page's UI to show loading screen
### What is this PR for?
At times Helium page's API takes time to return the result, the idea of
this JIRA is to show a loading screen while it takes time.
### What type of PR is it?
[Improvement]
### What is the Jira issue?
* [ZEPPELIN-3736](https://issues.apache.org/jira/browse/ZEPPELIN-3736)
### How should this be tested?
* Refer screen shot
### Screenshots (if appropriate)
Before:

After:

### Questions:
* Does the licenses files need update?
* Is there breaking changes for older versions?
* Does this needs documentation?
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/prabhjyotsingh/zeppelin ZEPPELIN-3736
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/zeppelin/pull/3152.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #3152
----
commit e4f4b9894002f02a197b413d987c74f54fdf02d0
Author: Prabhjyot Singh <prabhjyotsingh@...>
Date: 2018-08-20T06:19:10Z
loading screen in helium page
Change-Id: I9156f8ad60128dc4b1a5005c4d81098b81c47905
----
---