overview: Remove command statistics.
overview: Cosmetic changes.

* Don't pass unresponsive to the view, access config[] object instead
* Remove the statistics header, it only takes up space
* Lowercase a few things
* Change the descriptions for 'radiator' to make the math work: Because
  of how PuppetDB's aggregate-events-count works nodes with both
  successful and failed events count for both causing success + failure
  + unreported to not equal population, which is weird. Now we're simply
  stating that they have failed events instead of saying that the node
  is succesful/failed.