Noticed when implementing restore-via-menu for curses a couple
of days ago: The "Who are you?" prompt wouldn't let me cancel
out via <escape>. I created a character named '\033' which was
displayed as "^[" during play and produced a save file shown by
'ls' as "501?.Z".
To fix this properly, we will need to replace use of wgetnstr()
with something of our own. That's more work than I feel like
tackling. This fakes ESC handling if the player is willing to
type <escape><return> rather than just <escape> when terminating
the prompt.
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