Allow Action Menu off of Displayed Fields for Widget "Message Table"

When creating message table widgets in the search page or dashboards, it would be much more efficient to click a value you see in the "Displayed Fields" and have the actions like "Insert Into" a view available there. Now when you click on them it expands the whole message and you have to go find the field you want to insert into the action menu

## What?
Allow the action menu to be activated when clicking on the Displayed Field

Would like to have this when clicked on the one above:

## Why?
After you create the right message table layout, with all the fields you want to see, it slows down the investigation to open the full message up, to then perform the action on it.

## Your Environment

* Graylog Version: 3.2.4
* Elasticsearch Version: 6.8
* MongoDB Version: 4.x
* Operating System: Ubuntu 18.04
* Browser version: Safari/Chrome