The search box in the upper right uses the search API for its

auto-complete. This was just doing the API request with the query and

then pulling out the information it needs, but the results from that API

request includes a whole lot of stuff that we really don't care about.

This change adds limiting to that API request so we only get the data

which is used to display the search results in the drop-down, along with

the URL.

Did a bunch of quick searches to verify that review requests, users,

  and groups were all displayed correctly and opened the correct URLs

  when clicked.
Ran js-tests.