title: Not able to format milliseconds with DateTimeFormatter
body: <p>I am not able to get milliseconds with DateTimeFormatter. I lost a few hair to this already:</p>
  
  <pre><code>&lt;fx:Declarations&gt;
      &lt;s:DateTimeFormatter id="dtf" 
                           dateTimePattern="{pattern.text}"
                           errorText="Invalid input value"/&gt;      
  &lt;/fx:Declarations&gt;
  &lt;s:HGroup&gt;
      &lt;s:TextInput id="pattern" /&gt;
      &lt;s:Label text="{dtf.format( new Date())}" /&gt;
  &lt;/s:HGroup&gt;
  </code></pre>
  
  <p>When I type "y-MM-dd HH:mm:ss.SSS#" in {pattern} , I am not seeing anything between the dot and the pound sign. Does SSS only work for parsing?</p>