title: Rhomobile Migration from Rho3.1 to Rho 4.0 Alert Msg. Error
body: <p>I am trying to migrate my rho application from 3.1 to 4.0. In 3.1 i have defined alert using <code>Alert.show_popup :title => "Please Wait", :message => "Fetching Data..."</code> But as specified in documentation now i have changed it to the </p>
  
  <pre><code>dataPopProps = Hash.new
  dataPopProps['message'] = "Fetching Data...";
  dataPopProps['title'] = "Please Wait";
  Rho::Notification.showPopup(dataPopProps)
  </code></pre>
  
  <p>But i am still getting the same error.<img src="https://i.stack.imgur.com/CQnFl.png" alt="Error Shown on mobile">
  <strong>Error: Button list has been incorrectly defined. DIalog will not Launch</strong></p>
  
  <p>Any help will be great.</p>