If I Revert a Space and then Extract an App from it, it crashes

(Bug, Closed -> Fixed, Priority: Critical, Test Status: No automated tests yet , Reported By Justin du Coeur, )
Apps, History
Summary: Specifically, this is true if you Revert and Extract without reloading in the middle.
The crash is at AppsSpacePlugin:56 -- it is clear from the crash that state.ownerIdentity is empty, so .get is crashing.
The strong implication is that Revert is resulting in a SpaceState that is incomplete. At the least, it doesn't have an ownerIdentity; we should see if it is broken in other ways.