title: Missing asterisk in the label of the required field in cakephp
body: <p>I have problem with displaying required fields in Cakephp 2.4.2.</p>
  
  <p>If I use</p>
  
  <pre><code>$this-&gt;Form-&gt;input('username');
  </code></pre>
  
  <p>in rendered html I have</p>
  
  <pre><code>&lt;div class="input text required"&gt;
      &lt;label for="UserUsername"&gt;Username&lt;/label&gt;
      &lt;input name="data[User][username]" type="text" id="UserUsername" required="required"/&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>and the label has asterisk: username*</p>
  
  <p>If I want to use Twitter Bootstrap with its horizontal form style, my input changes to something like this:</p>
  
  <pre><code>&lt;div class="form-horizontal"&gt;
      &lt;div class="form-group"&gt;
          &lt;label for="username" class="col-xs-3"&gt;&lt;/label&gt;
          &lt;div class="col-xs-4"&gt;
              &lt;?php echo $form-&gt;input('username',array('id' =&gt; 'username','label' =&gt; false)); ?&gt;
          &lt;/div&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>which results in</p>
  
  <pre><code>&lt;div class="form-horizontal"&gt;
      &lt;div class="form-group"&gt;
          &lt;label for="username" class="col-xs-3"&gt;Username&lt;/label&gt;
          &lt;div class="col-xs-4"&gt;
              &lt;div class="input text required"&gt;
                  &lt;input name="data[User][username]" id="username" type="text" required="required"/&gt;
              &lt;/div&gt;
          &lt;/div&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>and label lost asterisk: username</p>
  
  <p>Basically, if Cake input has option 'label' => false it will have input label without asterisk:</p>
  
  <pre><code>$this-&gt;Form-&gt;label('User.username');
  $this-&gt;Form-&gt;input('username',array('label' =&gt; false));
  </code></pre>
  
  <p>results in</p>
  
  <pre><code>&lt;label for="UserUsername"&gt;Username&lt;/label&gt;
  &lt;div class="input text required"&gt;
      &lt;input name="data[User][username]" type="text" id="UserUsername" required="required"/&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>and no asterisk in the label.</p>
  
  <p>What would be the way to have asterisk in the label of the required field while using Cake Form Helper?</p>