title: How to automatically close an NSPopover in NSStatusBar on Exposé/Mission Control
body: <p>For other applications, like Dropbox and 1Password, the popover that opens when you click the NSStatusItem in the top bar automatically hides (and then reshows) if you open up Exposé/Mission Control with F3 to switch spaces.</p>
  
  <p>How is this accomplished?  I can't figure out a good way to listen for the F3 event like you can for left/right click, and 1Password works despite having Accessibility access enabled <a href="https://stackoverflow.com/questions/9352939/how-can-one-detect-mission-control-or-command-tab-switcher-superseding-ones-pro">for something like this</a>.</p>
  
  <p>Thoughts?</p>