       <div class="panel-heading portlet-header">
                           <i class="fa fa-bar-chart-o fa-fw"></i> <span type="button" class="dropdown-toggle click-title span-title" data-toggle="collapse" href="#bodyResponseTimeDistribution" aria-expanded="true" aria-controls="bodyResponseTimeDistribution">Response Time Distribution</span>
                           <div class="pull-right">
                                <div class="btn-group">
                                    <a class="drag btn btn-l