Choice Order should be limited to just the Instances of this Model

(Bug, Investigate , Priority: Medium, Test Status: No automated tests yet , Reported By Justin du Coeur, )
Editor
Summary: When I am adding the Choice Order property, I am offered all of the Links in this Space. That's silly and inconvenient: I should only see the valid choices, which are the Instances of this Model.
Unfortunately, there's no obviously-easy way to specify this. However, it is lower priority, because we plan to implement a Choice-specific wizard soonish anyway.