Summary: Fixes T4777. We technically support `?projects=...` already, but parse it in an unusual way and apply old, awkward, excessively strict lookups to it.
Test Plan: Used reasonable, standard, human-readable strings to prefill `?projects=` and got the results I expected.
Reviewers: btrahan, chad
Reviewed By: chad
Subscribers: epriestley
Maniphest Tasks: T4777
Differential Revision: https://secure.phabricator.com/D8733