RadDropDownTree  provides several templates for easier customization of the
        dropdown.
    
        Header Template - positioned at the very top of the DropDown it
        can easily be customized in order to match the desired appearance.
    
    
        Node Template - you can create a single template that could be
        applied to all of the nodes in the DropDownTree.
    
    
        Footer Template - positioned at the very bottom of the dropdown
        it enables you set your custom footer.