title: SHOW_ALL gets too big instead of scaling
body: <p>I want to run a two screen application with AIR on my Macbook Pro with Retina display.</p>
  
  <p>On my left screen (the retina) there is kind of a console, with which you select a movie, on the right screen, there is the selected movie playing.</p>
  
  <p>As usually, I use the StageScaleMode.SHOW_ALL to bring it nicely to fullscreen. But this time, it gets scaled way too big. Maybe 100 times too big. I see only a small top left corner of the movie. It only shows the correct size if I choose StageScaleMode.NO_SCALE;</p>
  
  <p>Has anyone a guess why its like this?</p>
  
  <p>here is the portion of the code, where I bring up the two windows and try to show it fullscreen.</p>
  
  <pre><code>public  function setToFullscreen(e:Event):void {
  
                      startTimer.stop();
                      startTimer.removeEventListener("timer", setToFullscreen);
                      windowBig = new NativeWindow(new NativeWindowInitOptions());
                      windowBig.width = 1870;
                      windowBig.height = 468;
                      windowBig.stage.displayState = StageDisplayState.FULL_SCREEN; 
                      windowBig.stage.scaleMode = StageScaleMode.SHOW_ALL;
  
  
  
                      windowBig.stage.align     = StageAlign.TOP_LEFT;
                      windowBig.title = "Second Screen Window";
  
  
                      windowSmall = stage.nativeWindow;
                      windowSmall.width = 1280;
                      windowSmall.height = 1024;
                      windowSmall.stage.scaleMode = StageScaleMode.NO_SCALE;
                      windowSmall.stage.align     = StageAlign.TOP_LEFT;
  
                      windowSmall.title = "First Screen Window";
  
  
  
  
                      ScreenManager.openWindowFullScreenOn(windowBig,2);
  
                      loader.load();
  
                               }
  </code></pre>
  
  <p>Thank you for your help!</p>