Switch Graph Drilldowns to Glyphs and Activate using three dot click

[TheWitness]

Feature Request

Is your feature request related to a problem? Please describe

Convert the Graph Drilldown's to a Three dot Popup menu.

Describe the solution you'd like

This makes the display more consistent with other monitoring tools and much easier on the eyes.

Describe alternatives you've considered

None

Additional context

Consideration should be made for plugin based additions. Maybe we should intercept the hook in lib/plugins.php.