title: Show a paneloverlay when ever a checkbox is checked
body: <p>Basically What it says in the title. The problem is right now it shows on change regardless if it was checked or unchecked.</p>
  
  <pre><code>                    &lt;h:selectBooleanCheckbox id="checkbox" value="checkbox" &gt;
                      &lt;/h:selectBooleanCheckbox&gt;
  
                      &lt;p:overlayPanel for="checkbox" widgetVar="descOverlay"&gt;
                          Test
                      &lt;/p:overlayPanel&gt;
  </code></pre>