Project jobset: update search

[grahamc]

Extracted from #1093.

My methodology here is to:

1. Pick a commit from Builds: drop the jobset and project columns #1093
2. Check out the parent commit
3. Run the test suite and identify failing tests
4. Check out the picked commit and run those failing tests
5. Verify the picked commit fixed at least one test.

If it didn't, write a test and verify it is broken before / fixed after the picked commit.

The picked commit in this case was search: fix references to jobset / project info.