title: Is it possible to use EL inside <p:dialog> header?
body: <p>Is it possible to use EL inside header of a PrimeFaces 3.5 dialog?</p>
  
  <pre><code>&lt;p:dialog widgetVar="personneDialog" id="personDlg" hideEffect="explode"&gt;
      &lt;f:facet name="header"&gt;
          Details of: #{personneMB.selectedPerson.name}"
      &lt;/f:facet&gt;
  </code></pre>
  
  <p>This prints only an empty string:</p>
  
  <p><img src="https://i.stack.imgur.com/Txjdl.png" alt="enter image description here"></p>