Need to change the visibility of drop down items in overflow mode when click the drop down items.
For example user have total 5 tab items with visible header count is 3.
Tab 1, Tab 2, Tab3 are visible (from left to right)
Tab 4, Tab 5 are in DropDown
User selects Tab 4 from the DropDown (which would be the first item to the right of those tabs currently visible)
Visible tabs are now Tab 2, Tab 3, Tab 4 (from left to right)
Tab 1, Tab 5 are in DropDown User selects Tab 5 from the DropDown (which would now be the first item to the right of those tabs currently visible)
Visible tabs are now Tab 3, Tab 4, Tab 5 (from left to right)
Tab 1, Tab 2 are in DropDown
User selects Tab 1 from the DropDown (which would now be the item two to the left of those tabs currently visible)
Visible tabs are now Tab 1, Tab 2, Tab 3
Tab 4, Tab 5 are in DropDown