title: panelGroup rendered tag not working
body: <p>I have a <code>&lt;h:panelGroup&gt;</code> tag with a <code>rendered</code> attribute. The function it calls to determine whether it renders or not returns true, I have logged and printed this to make sure.</p>
  
  <p>The structure looks as follows:</p>
  
  <pre><code>&lt;h:form&gt;
      &lt;div&gt;&lt;!-- content --&gt;&lt;/div&gt;
      &lt;h:panelGroup&gt;
          &lt;h:panelGroup rendered="#{bean.function(parameter)} == true"&gt;
              &lt;!-- content --&gt;
          &lt;/h:panelGroup&gt;
      &lt;h:panelGroup&gt;
  &lt;/h:form&gt;
  </code></pre>
  
  <p>The panelGroup with the rendered tag is never displayed, even though the function returns true. Any idea why this isn't working?</p>