Refinable results page: don't show any results for a blank search

We want people to be able to bookmark pages like https://gs-staging.galileo.usg.edu/uga1/bentos/scholarly so they can skip straight to doing a scholarly articles search, so we want to make that page — without any search terms — look nice and load fast. Right now, it'll run a blank search against the EDS API and return 20 arbitrary items. Depending on how the bento is configured, it may fail for a blank search. (Just an example; this issue is not EDS-bento-specific.)

We should:

• not conduct a search
• change the "<- All Bento Results" link to go to the GALILEO homepage instead (and change the label on the link)
• hide the whole results area (including the limiters/facets column). Maybe add some extra margin-top to the search box/bento title, so it looks more vertically centered
• Devise a way to show applied limiters if present (even though the facets column where they normally appear will be hidden). It's possible to bookmark a URL with no search terms but with some pre-applied limiters. However, because the human-readable label for the limiters is only obtained after an AJAX request, we'll just have to show something vague like "2 applied limiters"