I agree with Thomas, this should really be done inline rather than with a separate dialog.
So far I have a little patch to allow editing of the titles, but the TabLabel class needs to be updated to understand when it has a custom name and that it should not then apply updates to it. This will not be hard, just need plenty of testing and some thought about a way to revert a tab back to automatic naming.
I agree with Thomas, this should really be done inline rather than with a separate dialog.
So far I have a little patch to allow editing of the titles, but the TabLabel class needs to be updated to understand when it has a custom name and that it should not then apply updates to it. This will not be hard, just need plenty of testing and some thought about a way to revert a tab back to automatic naming.