R1:e6b7f655ee80

Support Spaces in Passphrase

Summary: Ref T8493. This stuff mostly takes care of itself now.

Test Plan: Shifted stuff between spaces, verified transactions/headers showed up correctly. Queried by space.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: joshuaspence, epriestley

Maniphest Tasks: T8493

Differential Revision: https://secure.phabricator.com/D13386