title: Password field in editing
body: <p>When I want edit my user I have a problem with the password field. When I select my user to edit I can edit first name, last name and password but I can edit only first name and leave the password field unchanged. When I click edit start I receive an error: </p>
  
  <pre><code>The password field is empty.
  </code></pre>
  
  <p>My password field:</p>
  
  <pre><code>&lt;p:password id="password" value="#{userMB.user.password}" label="#{msg.password}" required="true"&gt;
      &lt;f:validator validatorId="passwordValidator2" /&gt;   
      &lt;p:ajax update="msgPassword" event="keyup" /&gt; 
  &lt;/p:password&gt;
  </code></pre>
  
  <p>Why?</p>
  
  <p>When I changed the <code>&lt;p:password&gt;</code> with <code>&lt;h:inputText&gt;</code> it worked fine. But I see password my user...
  Why <code>&lt;p:password&gt;</code> does not read the initial value of <code>userMB.user.password</code>?</p>