title: Data binding will not be able to detect assignments to "topLevelApplication"
body: <p>I am migrating an application from Flex 3 to Flex 4.
  In some cases there are popup windows of which the width and height is bound to the application width and height.</p>
  
  <pre><code>width="{Application.application.width - 24}" 
  height="{Application.application.height - 32}"
  </code></pre>
  
  <p>Application.application is deprecated in 4.0. so I have replaced this with</p>
  
  <pre><code>width="{FlexGlobals.topLevelApplication.width - 24}" 
  height="{FlexGlobals.topLevelApplication.height - 32}"
  </code></pre>
  
  <p>Now the compiler gives the warning that data bindings cannot be detected for topLevelApplication. </p>
  
  <blockquote>
    <p>Data binding will not be able to
    detect assignments to
    "topLevelApplication"</p>
  </blockquote>
  
  <p>My question is: Is there another (bindable) property somewhere that I can use to get the same functionality as before?</p>