title: SmartGWT modal window
body: <p>I have problem with modal window. I call this two methods <code>setIsModal(true)</code> and <code>setShowModalMask(true)</code> but why my window isn't modal ?</p>
  
  <p>Here is the Code :</p>
  
  <pre><code>Window summaryWindow = new Window();
  summaryWindow.setWidth(950);
  summaryWindow.setHeight(620);
  summaryWindow.centerInPage();
  summaryWindow.setCanDragReposition(false);
  summaryWindow.setIsModal(true);
  summaryWindow.setShowModalMask(true);
  summaryWindow.setShowMinimizeButton(false);
  summaryWindow.setTitle("Example");
  summaryWindow.addItem(new Button("Example");
  summaryWindow.show();
  </code></pre>