Add custom class for panels

[amitozdeol]

Each panel can have it's own class.
If tabs have a class name starting with 'panel', then that class will also get added to the panel.

Ex-

.panelred-important{
      color: red important!;
}

Desktop - 
<div class="tab-content hidden-xs">
    <div class="tab-pane fade  in active  panelred-important">
        <h3>Tab content</h3>
    </div>
</div>

Mobile - 
<div class="panel-group visible-xs" id="Yp9lW-accordion">
     <div class="panel panel-default panelred-important">
           <div class="panel-heading"> ... </div>
           <div class="panel-body"> 
                <h3>Tab content </h3>
           </div>   
     </div>
</div>