title: selectItem in a SelectOneRadio reseting tabindex count
body: <p>I have the following SelectOneRadio:</p>
  
  <pre><code>&lt;p:selectOneRadio id="sex" tabindex="3" value="#{signUp.gender}" required="true"&gt;  
      &lt;f:selectItem itemLabel="Male" itemValue="M"  /&gt;
      &lt;f:selectItem itemLabel="Female" itemValue="F" /&gt;
  &lt;/p:selectOneRadio&gt;
  </code></pre>
  
  <p>Although the tabindex of the next element in my form is 4, when I tab to the "sex" component, and select any of the selectItem with either the space bar or with a mouse click, when I press  the tab key again, the focus goes to the element with tabindex = 1, instead of the next one. 
  How can I fix this?</p>
  
  <p>I'm using primefaces 4.0 </p>
  
  <p>Thanks!</p>