Opened Window Selector Dropdown Menu Button?

I am not aware of any command that would support this. Could be something like Go LISTERLIST that creates a dynamic button. Certainly seems useful.

A script could create a dialog that shows all open listers. I am not sure, though, if there is a control that doesn't require a confirmation after the selection. That extra step would be a bit clumsy.

Maybe you like CycleListers. That script lets you cycle through listers like documents.