Accesing or Disabling PickerIcon popup Canvas

[mduduzik]

Environment:
- GWT 2.1.1
- SmartGWTPro2.4

Issue:
I have a SpinnerItem on which I have set setShowPickerIcon(true). I have also added a handler with addIconClickHandler(customHandler).

The problem is both customHandler and a popup as shown on the attachment are shown when the picker is clicked.

The question is how do I either access the inner canvas/layout of this default popup or turn it off completely.

Thanks.