Filterable search history

Created by: benvenker

Successful outcomes of this issue

• History items are available in suggestions when typing
• History items always show at the top of suggestions when available

Background

In today's intentionally minimal search history implementation, users aren't able to filter search history by typing or to get autocompleted search history suggestions in the normal suggestion types. We did this to defer having to think about how to how to combine search suggestion types.

More context in this Slack thread with some implementation concerns. Summarizing: the thinking was we'd basically have to combine suggestion types into one suggestion menu, which could be complicated

However, I don't think this is as big of an issue as it seems: we already combine suggestion types in the suggestions dropdown. We'd just need to add/allow and show the history items and the icon (and the query as we do now in history)

Google search history item in suggestions