Dashboard field labels to include pop-up text describing what has been calculated and how

[hughesthe1st]

Is your feature request related to a problem? Please describe.
It is hard to know exactly what is being displayed in dashboard results, as some labels are icons, and some names are not obvious as to what meaning/results they convey.

Describe the solution you'd like
When viewing an Azimuth dashboard of results I would like to be able to mouse-over or touch a field label for the computed results to see a pop-up description of what has been calculated, and how, so that I have more understanding and confidence in interpreting what the dashboard is showing me.

The field label could include a thin dashed line underneath to indicate that it has some sort of associated action with the label, similar to a URL.

Describe alternatives you've considered
The field label could include an icon next to it to indicate that it has some sort of associated information related to the label, similar to a tooltip.

Additional context

For example, in this Performance Analysis dashboard, what do each of the fields represent, and how was it calculated?