Notify user when we don't display all the results, but only the xxx first results

[TheoChevalier]

Currently users can't tell if the result page displays all the results for his search, or only the first 200 results, b/c of performance.

I propose the update the Matching strings as follow:

**When we display all the results (let's say, 42 results):
42 matching results for the string Bookmark in en-US:

**When we don't display all the results:
First 200 matching results for the string Bookmark in en-US: