[Recommended add-ons]
Follow up for #6525

STR:

1. Open AMO -dev
2. Try to search for add-on without providing a query string- i.e. https://addons-dev.allizom.org/en-US/firefox/search/ or https://addons-dev.allizom.org/en-US/firefox/search/?type=extension
3. Observe the results

Actual result:
As per @eviljeff 's comment in #6525, when no search string is provided , the API defaults to weekly downloads. On -dev, at least, this means that recommended add-ons are not boosted in search results

Expected result:
Since we plan to boost recommended extensions in search results, I would expect to see the add-ons from the curated list on the first pages of results when no search string was provided.

Notes:

• the PRD doesn't mention an approach for this specific scenario