When search was rewritten for 3.0, search filters were rewritten along

with it. While they worked under the hood, it broke the display of

filters.
When attempting to display the filter options at the top of search

results, the template was iterating over keys and not items, resulting

in invisible nonsense being injected into the page. This masked the

"active filter" check, since filters weren't even being rendered, and

this was broken due to checking the wrong form field.
This change fixes the template iteration and the active check, bringing

back full functionality.

Tested all filter modes. Verified that filters displayed and the

active one was always specially displayed.