bug964306 add preview to popup icon

Ah yes, this is true.

I wonder if it makes sense to have the icon preview in a little tiny picture beside the dropdown element. At this point someone's eyes are averted from the actual popup trackevent itself so it may not be the most noticeable thing in the world having it dynamically change that. If it was changing a tiny image right beside it that becomes a whole lot more noticeable.

Just food for thought here.