Display multiple variables on table at once

sarva[CodePlex]
We would like a feature on each site's data page which allows for multiple variables to be displayed at once. This would include multiple columns each representing one of the variables associated with the site. Essentially, this would compare all of the
variables.

Start by locating the site's data page and the existing table for a single variable. Determine how variables are selected and rendered, then define the expected multi-column comparison behavior and verify that several variables can be displayed together without changing single-variable use.

Written by the indexing model from the issue text.