Perhaps, you could use some buttons like what was suggested in this thread is-there-already-or-can-you-develop-tabs.
It's a set of buttons that indicate the last tab group selected. Then when you open the save dialog you could see on the toolbar what one you last loaded and would know what one to overwrite.
This has quite a few limitations, Multiple Listers opened, or opening Tab Groups by means other than using the buttons. However it is simple to try out and there is no scripting as such, just some buttons.