Separate style for a collapsed ACTIVE 'window' node

Your extension kicks ass. 

The .ftRowNode[rowtype=window] style should change if that window node is active. When I select a tab and then collapse it, there is no way to tell that is actually the active window node.

BTW I hacked your css to create my own. I don't know if it would survive an update. I know theme support is hard to do but it would be nice.