title: NSMenuItem and bare esc key equiv
body: <p>I'm trying to bind a bare esc key press to an NSMenuItem that toggles full screen (currently just a stub function). Manually selecting the menu item sends the desired IBAction. When I set the NSMenuItem's Key Equiv. in Interface Builder to an arbitrary bare key (eg. w) that key command sends the desired IBAction. When I set the Key Equiv. to command + esc, that key command sends the desired IBAction. But a bare esc key press is ignored. </p>
  
  <p>I'm assuming the esc key is special-cased. Other applications (eg. Bannister's various emulators) are able to achieve this, any idea how?</p>