How can I restrict the availability of the Add New button next to a reference presented as a drop down? I have a BO (Product) with a reference item (Manufacturer) presented on the edit product form as a drop down list. For certain access levels I want to allow them to edit the reference by selecting a different item in the Manufacturer drop down but not allow them to add a new Manufacturer. In other words, this Add New button should only be allowed for the admin user level.
