How can I set the width of a dropdown triggering button in bootstrap 3.0 to be equal to the width of the dropdown list? Similar to what is achieved when using bootstrap-select (http://silviomoreto.github.io/bootstrap-select/). I have tried to wrap the whole list in a div with a col-* class, but that doesn't seem to work:

<div class=row>

<div class=col-xs-4 col-md-4>

    <div class=dropdown>

      <button type=button class=btn btn-danger dropdown-toggle data-toggle=dropdown>Button</button>

          <ul class=dropdown-menu role=menu>

            <li><a href=#>Action</a></li>

            <li><a href=#>Action</a></li>

            <li><a href=#>Action</a></li>

          </ul>

    </div>

</div>

Thus, I would like: button width = dropdown menu list = col-* width.