title: Dismissing popup when RadioGroup Item Selected
body: <p>Using the awesome MonoTouch.dialog in some of my projects now and have a question.  I have a RadioGroup that I use to allow the user to select his home state, States is a string array.</p>
  
  <pre><code>    public static RootElement CreateStates ()
      {
          return new RootElement ("State", new RadioGroup (0)) 
          {
              new Section ("Choose State")
              {
                  from x in States
                     select (Element) new RadioElement (x) 
              }
          };
      }
  </code></pre>
  
  <p>This works fine, and when I select state the popup appears and I pick my state, but then I have to hit the back button in the nav bar to get back to my main screen.  Is there a way to have that popup dismiss when I select a choice?  Having to hit the back button is annoying.  Or am I just using the wrong solution to this altogether?</p>
  
  <p>My first thought was to subclass RadioElement and catch the selected event, but then I still wasn't sure how to dismiss the automatic selection popup?</p>