R1:d77a3f8760b4

Update Spaces for modular transactions

Summary: Updates the Spaces application for modular transactions, seemed easy to bang out.

Test Plan: Create a space, edit a space, archive a space. Verify default space works as intended.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D17829