warn when closing multi-tabbed window?

I like having one big Opera window with ten or twenty tabs.  But then
one day I wanted to close a single tab and accidentally clicked on the
button to close the entire window.  Poof, all my open tabs gone, and
since some of them hadn't been reloaded in weeks, they were no longer
in my history so I couldn't easily get them back.

Firefox and Safari will warn me with a pop-up that I'm closing a
mult-tabbed window.  Why won't Opera?
-- 
Ed Ravin          | "The law, in its majestic equality, forbids the rich
as
                  |  well as the poor to sleep under bridges, to beg in the
 eravin@          |  streets, and to steal bread."