Add in context documentation to visualization in Data Sources

[t-abdul-basser]

Expected behavior

Data Sources Visualizations feature in more in-context documentation (e.g. mouse over descriptions) that explain/introduce the visualizations

Actual Behavior

Visualizations in Data Sources do not feature in-context documentation (mouse over descriptions).

Steps to reproduce behavior

Open Data Sources > View Visualizations

[anthonysena]

@t-abdul-basser - I'm thinking that we can apply the approach that is illustrated in #1458 whereby the description is in the footer of the display. Furthermore, it would be ideal if we re-use the same descriptions from Achilles: https://github.com/OHDSI/Achilles/blob/master/inst/csv/achilles/achilles_analysis_details.csv. We can also use this as a way to indicate where there are opportunities to drill down per #1538. Let me know if you have any other thoughts on how to achieve this vision.

[pbr6cornell]

All Data sources graphs should be documented of what the content of the graph represents, @alondhe could you work on this with the ACHILLES workgroup?. I've tried to describe most of the plots in the ATLAS video tutorials.

Modifying the UI to dynamically display the documentation can wait until ATLAS 3.0, but getting the documentation completed so that it could be incorporated should be a target for ATLAS2.8.