I should be able to easily define a Choice Property

(User Story, To be Fixed , Priority: High, Test Status: No automated tests yet , Reported By Justin du Coeur, )
Editor, Properties
Summary: Currently, if I want to define a choice, I have to do it by hand: define the model and the instances, set Is a Choice, and create a Property. This should be one step under Create a New Property, with a specialized wizard.