Disable Close Button on the 'Tab Overview Panel'

Jul 17, 2011 at 8:00 PM

When you open more than one tab, a special tab (left most tab) appears that allows the user to see an overall view of all the tabs. For some reason all the tabs have a close button even though I set the close button to not be enabled on certain tabs. Does anyone have any idea how to disable the close button on the 'Tab Overview Panel'?