Made EntityForm.Parent virtual

InABox.Core/DigitalForms/Forms/EntityForm.cs

@@ -36,7 +36,7 @@ namespace InABox.Core
 
         [NullEditor]
         [EntityRelationship(DeleteAction.Cascade)]
-        public TParentLink Parent { get; set; }
+        public virtual TParentLink Parent { get; set; }
 
         [NullEditor]
         [Obsolete("Being Replaced by Form")]