Marketplace: There's no way to limit the search to one platform/partner/type/category

Steps:

1. Go to the Marketplace
2. Using the side menu, go to a sub-page, e.g. Addons
3. Perform a search using the search box

Expected result:
Searching applies to the specific page, e.g. searching in Addons gives a list of matching Addons. (It's suggested by the place the search box is placed.)
Or:
There are filters allowing the user to perform a search within a given subset of packages.

Actual result:
There’s no way to limit the search to a specific subset of packages (see video).