Fix '#repeat' for tty; both it and ^A can repeat an extended command.
Fix both for curses; they can repeat an extended command instead of
just repeating the initial '#' to start getting an extended command.
X11 (tested), Qt (tested), and probably Windows GUI (not tested)
behave the same as before: ^A (or #repeat) after an extended command
just repeats the # to run the dialog to get an extended command.
I hope this introduces fewer bugs than it fixes but I don't think I'd
bet on that....
31affa0722