title: NSWindow in front of all apps + ignores space/fullscreen transitions
body: <p>I'm working on an application for "fading out" a screen to hide the weird OS X full screen transition. In 10.7, I was able to do this by creating an NSWindow and using setCollectionBehavior to force it to float above everything else:</p>
  
  <pre><code>[window setCollectionBehavior:NSWindowCollectionBehaviorStationary | NSWindowCollectionBehaviorCanJoinAllSpaces | NSWindowCollectionBehaviorFullScreenAuxiliary];
  </code></pre>
  
  <p>My app launches, fades to black, then waits for a signal from the other app before fading out and showing the content underneath. However, in 10.8, it covers the screen, shows the transition moment when the app underneath goes full screen, then pops back in front of the app.</p>
  
  <p>Any ideas on how to push this app in front of these obnoxious transitions?</p>