title: Appcelerator/Titanium Holo UI in case of modal: true is not working
body: <p>I have problem with UI. </p>
  
  <p>I change default UI into Holo with changin tiapp.xml:</p>
  
  <pre><code>&lt;android xmlns:android="http://schemas.android.com/apk/res/android"&gt;
  &lt;tool-api-level&gt;14&lt;/tool-api-level&gt;
  &lt;manifest&gt;
      &lt;application android:theme="@android:style/Theme.Holo"&gt;
          &lt;activity android:name=".ThemetestActivity" android:theme="@android:style/Theme.Holo"&gt;
              &lt;intent-filter&gt;
                  &lt;action android:name="android.intent.action.MAIN"/&gt;
                  &lt;category android:name="android.intent.category.LAUNCHER"/&gt;
              &lt;/intent-filter&gt;
          &lt;/activity&gt;
      &lt;/application&gt;
  &lt;/manifest&gt;
  &lt;/android&gt;
  </code></pre>
  
  <p>Holo UI works fine. But if i open new window with prop model: ture, new window opens with old UI, not holo. But if modal false, it works fine (but back button not works. I use modal: ture, because i need back button to work).</p>
  
  <p>This is my code:</p>
  
  <pre><code>var myButton = Titanium.UI.createButton({
     title: 'Test button',
     width: 500,
     height: 100,
     top: 60,
     font: { fontSize: 30 }
  });
  
  table.addEventListener('click', function(e) {
      var window = Ti.UI.createWindow({
          title:'Flight Details',
          backgroundColor:'#fff',
          backButtonTitle: 'Back',
          modal: true
      });
  
     window.add(myButton);
      window.open( { animated: true } );
  });
  </code></pre>
  
  <p>Why new windows is not in Holo UI?</p>