title: Fieldset disabled property not working if input is enclosed by div tag
body: <p>bootstrap's disabled property on fieldset is supposed to disable all inputs under that fieldset tag.
  It works perfectly if input tags are right after fieldset tag or after legend tag. As soon as I insert div tag between fieldset and input then disabled property is not working. </p>
  
  <p>It works for following declaration...</p>
  
  <pre><code>&lt;form id="form"&gt;
      &lt;fieldset id="fieldset"&gt;
      &lt;legend&gt;User Details&lt;/legend&gt;
              &lt;input id="first_name" name="first_name" class="form-control" type="text"/&gt;
      &lt;/fieldset&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>But not If I add input inside div tag</p>
  
  <pre><code>&lt;form id="form"&gt;
      &lt;fieldset id="fieldset"&gt;
      &lt;legend&gt;User Details&lt;/legend&gt;
          &lt;div class="col-xs-12 col-sm-6 col-md-4"&gt;
              &lt;input id="first_name" name="first_name" class="form-control" type="text"/&gt;
              &lt;/div&gt;
      &lt;/fieldset&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>Can anyone please suggest how to get around this problem?</p>