R1:bf10b7602bec

Allow searching diffs by more status options

Summary:
This Fixes T5737. Apparently the functionality to search by different
statuses in differential was already there, but the options weren't
exposed in the frontend. I can't think of any reason why this should've
been the case, so I just added the other options.

Test Plan: Tested against some local diffs to match new query option.

Reviewers: joshuaspence, epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

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