Get aggregations off the hot path of search

[gestchild]

This comes from a slack conversation

It would reduce the load on then cluster if we didn’t have to do all the aggregations on every search.

For users with JavaScript:

• ditch aggregations from the initial query, and run new queries when the user opens one of the filter menus.

For users without JavaScript:

• have a “Filters” button as the only entry in the filter bar
• when it's clicked, reload the page with some special query parameter (e.g. with_aggregations=true) that will:
  • fetch the aggregations as part of the page load query
  • render them using something like a
    so they don't take up too much space on the page

[LaurenFBaily]

Is this still relevant? @gestchild

[gestchild]

I think it's still something worth doing, but probably not high priority