app/scripts/outlines/outlines.directive.html
<span ng-hide='ol.mobile' class="interface-visible interface-clickable ewa-checkbox">
<!--
Outlines?
<input type="checkbox" ng-model="ol.outlines">
-->
<button ng-click="ol.toggleOutlines()" class="icon-big outlines-icon" ng-class="{active: ol.outlines}" title="Borders"></button>
</span>