changing back something from yesterday: (details)

- Yesterday I set it so the search filters would not be initially
  displayed by default. This change reverts that, as it's actually
  nice to have them displayed on initial load, so you know they're
  an option. After performing a search those scope vars actually
  get set to the correct values which results in the filters
  dropdown being hidden (as the values all match the "hide filters"
  values in the controller, instead of being null/empty).

Signed-off-by: William Rockwood <wrockwood@tadl.org>