title: external panel in jquery mobile 1.4 causes display bug
body: <p>I thought my external panels (jQM 1.4) were working great, until I added more content to them, and now, I can see the external panel underneath my app's home page.</p>
  
  <p>If they are short, it's fine, but once they reach a certain height, you can scroll down on the home (first) page and see the panel's contents.</p>
  
  <p>The <a href="http://demos.jquerymobile.com/1.4.0/panel-external/" rel="nofollow">new docs</a> aren't much help :/</p>
  
  <p>I've tried a lot of variations... but here's a basic example that will trigger it:</p>
  
  <pre><code>&lt;div data-role="panel" id="imExternal" data-theme="a"&gt;
    &lt;div style="height: 1200px; background: #000;"&gt;
      &lt;p&gt;this is the panel, code is tight and outside of any containing page divs.&lt;/p&gt;
    &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>*update: I'm specifically seeing it in my app with a popup open, and then clicking on an input field to show the Android keyboard. It seems to resize the page, which shows content from another page (external panel) underneath it.</p>