Github user asfgit closed the pull request at:
https://github.com/apache/zeppelin/pull/1178
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GitHub user corneadoug opened a pull request:
https://github.com/apache/zeppelin/pull/1178
[Zeppelin-1167] Group $scope.$on functions
### What is this PR for?
This is a small refactoring PR for zeppelin-web.
This is moving all the code's `$scope.$on` functions together at
