Show the recommended badge in autocomplete results

[bobsilverberg]

Depends on #6674
This is a spin-off from #13081.

As per #13081, we should show the recommended badge in the autocomplete results:

[bobsilverberg]

@eviljeff I believe this will need a change to the Autocomplete endpoint in order to expose is_recommended.

[ioanarusiczki]

@bobsilverberg I verified the autocomplete on AMO dev - FF67(Win10).

• the badge shows in the autocomplete results for all types of add-ons: extension, language, dictionary, statictheme.
• hovering (or navigating using the keyboard ) over an add-on with a recommended badge will display the blue arrow which is as expected.
• the default sort for autocomplete (as it's for search) is relevance if a search query is present so the recommended add-on doesn't have to be the first always (if I use a general term such as Web or awesome as in the example below). But in general, I found the recommended addon in the first place if I typed in the first part of an add-ons name that I knew it's a recommended one.