WIP - you can set/remove exemplars and show/hide data rows, but this is in serious need of refinement (and, for example, you cannot yet remove exemplars from the overview tab).
Okay, yes, this is the WRONG way to do quick facts, but hey, it's working. So I'm committing it... but I need to redo it, now... since I mixed that in with show/hide stuff, I needed to keep what I had.