Collapsable panel
<div class="panel panel-white">
<div class="panel-heading clickable" ng-click="bySession = !bySession">
<h4 class="panel-title text-primary">By Session
<a class="btn btn-transparent btn-sm pull-right" tooltip-placement="top" uib-tooltip="Collapse">
<i class="fa" ng-class="{'fa-minus' : !bySession, 'fa-plus' : bySession}"></i>
</a>
</h4>
</div>
<div uib-collapse="bySession" ng-init="bySession=false" class="panel-wrapper in collapse" style="height: auto;">
<div class="panel-body">
</div>
</div>
</div>