ZEPPELIN-3575. Add 'Copy Column Name' button in visualization table

[mebelousov]

What is this PR for?

Add button to drop-down list in visualization table to copy column name.
I know that column name could be obtained in a different way, for example, by auto-complete.
Nevertheless I think this feature is comfortable.

What type of PR is it?

Feature

What is the Jira issue?

ZEPPELIN-3575

How should this be tested?

• Manually

Screenshots (if appropriate)

Questions:

• Does the licenses files need update? no
• Is there breaking changes for older versions? no
• Does this needs documentation? no

[jongyoul]

I'm not familiar with FE, but do you have any idea to test this feature? It would be perfect if you add test case for it.

[mebelousov]

@jongyoul I also haven't good idea to write small and useful test.
It's possible to rewrite copyStringToClipboard as pass to function the column number and then put in clipboard column name, although it's not straightforward way.

[jongyoul]

Sorry for the late reply. How about adding an integration test?

[mebelousov]

Will try to revert with tests.