[patch] Gorm, menu editor

[Matt Rice]

This fixes a NSApplication.m:3995:      NSLog(@"Bogus attempt to set
main window");
from gorm when double clicking a pop-up button then trying to edit the
pop-up menu item by clicking on it,
not sure why it wants to be the main window, but it does..
it still seems to suffer from unmapping/remapping all windows causing a flicker,
but at least now it sometimes works.

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