title: PrimeFaces commandButton doesn't navigate or update
body: <p>I'am using Primefaces to make my app a little bit more beautiful. I noticed that <code>p:commandButton</code> and <code>h:commandButton</code> don't work the same way.</p>
  
  <p>The <code>p:commandButton</code> calls the method and nothing else hapens. The <code>h:commandButton</code> calls the method and returns a navigation.</p>
  
  <p>I have got trouble with redirecting after pressing the login button when using <code>p:commandButton</code>. How to deal with that?</p>
  
  <hr>
  
  <p>I do have an update parameter:</p>
  
  <pre><code>&lt;p:commandButton value="Login" action="#{login.login}" type="submit" update="msgs" /&gt;
  </code></pre>