[Ohrrpgce] SVN: teeemcee/8897 Fix map resize menu becoming stuck if you pressed alt-F4

[subversion at HamsterRepublic.com]

teeemcee
2017-06-19 10:15:11 -0700 (Mon, 19 Jun 2017)
266
Fix map resize menu becoming stuck if you pressed alt-F4

Happened because it brings up a "Cancel resize?" prompt which defaulted to NO
on ESC. I'm not sure why this caused all keys except Left and Right to stop
responding. Or why it only became stuck half the time.
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U   wip/mapsubs.bas