title: "FlexGlobals.topLevelApplication.addEventListener" can't catch keyboard input on PopUp
body: <p>Suppose I have an application and a global event listener in it. Should the key events, who are fired in the PopUp, be caught by that listener? Or maybe popups are not placed in that hierarchy?
  Here's simplified test-code for you to understand what I'm talking about:</p>
  
  <pre><code>&lt;mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" creationComplete="init()"&gt;
  &lt;mx:Script&gt;&lt;![CDATA[
  private function init():void {
              FlexGlobals.topLevelApplication.addEventListener(KeyboardEvent.KEY_DOWN, myKeyDownHandler);
          }
  
          private function myKeyDownHandler(event:KeyboardEvent):void {
              Alert.show("It works!");
          }
  
          private function makeNewPopup():void {
              var win:PopupWindow = new PopupWindow(this, new TestingForm(), true, "Popup", false);
              win.showPopup();
          }
  ]]&gt;&lt;/mx:Script&gt;
  &lt;mx:VBox&gt;
          &lt;mx:TextInput/&gt;
          &lt;mx:Button label="MakePopup" click="makeNewPopup()"/&gt;
      &lt;/mx:VBox&gt;
  &lt;/mx:Canvas&gt;
  </code></pre>
  
  <p>Ok, what we have .. after running the application, put the input focus into the TextInput and press any letter. The Alert will be fired. Now, press the MakePopup and do the same in it TextInput .. no any feedback from it.</p>
  
  <p>Any thoughts about that?</p>