I have a DashboardObject that I have setup for users to be able to create/edit using the ModelAdmin and was trying to figure out how to make the $has_many DashboardCategory (another custom object controlled with a ModelAdmin) look and feel like the Editor Groups Dropdown where they can select any already created DashboardObject(s) within the getCMSFields() function. Is this a built in Field type I can add or do I have to go more indepth to get that feel and functionallitie? Haven't be able to find it in the api yet.