Closes#18254Closes#18219Closes#17690
This fixes the project search not highlighting all results.
The problem was relatively simple, even though it took a while to find
it: we inserted multiple excerpts concurrently and the order in the
multi-buffer ended up being wrong. Sorting the resulting `match_ranges`
fixed the problem, but as it turns out, we can do a better job by moving
the concurrency into the method on the MultiBuffer.
Performance is the same, but now the problem is fixed.
Release Notes:
- Fixed search results in project-wide search not being highlighted
consistently and navigation sometimes being broken (#18254, #18219,
#17690)
---------
Co-authored-by: Bennet <bennet@zed.dev>
93a4295f66