File: app/views/admin/topbar.twig

<nav class="navbar navbar-inverse navbar-static-top" role="navigation" style="margin-bottom: 0">
    <div class="navbar-header">
        <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".sidebar-collapse">
            <span class="sr-only">Toggle navigation</span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
        </button>

        <img src="{{assetUrl}}images/logo.png" alt="xsanisty logo" class="navbar-logo">
        <a class="navbar-brand hidden-xs" href="{{siteUrl('/')}}">
            Slim Starter Application
        </a>
    </div>
    <!-- /.navbar-header -->

    <ul class="nav navbar-top-links navbar-right hidden-xs">
        <!-- /.dropdown -->
        <li>
            <label for="" class="loader label label-info" id="loader">
                Loading <img src="{{assetUrl}}images/loader.gif" alt="">
            </label>
        </li>
        <li class="dropdown">
            <a class="dropdown-toggle" data-toggle="dropdown" href="#">
                <i class="fa fa-user fa-fw"></i>  <i class="fa fa-caret-down"></i>
            </a>
            <ul class="dropdown-menu dropdown-user">
                <li><a href="#"><i class="fa fa-user fa-fw"></i> User Profile</a>
                </li>
                <li><a href="#"><i class="fa fa-gear fa-fw"></i> Settings</a>
                </li>
                <li class="divider"></li>
                <li><a href="{{ urlFor('logout') }}"><i class="fa fa-sign-out fa-fw"></i> Logout</a>
                </li>
            </ul>
            <!-- /.dropdown-user -->
        </li>
        <!-- /.dropdown -->
    </ul>
    <!-- /.navbar-top-links -->

</nav>
<!-- /.navbar-static-top -->