<md-button class="che-toggle-button"
           ng-class="controller.getCss(value ? value : title)"
           ng-click="controller.onClick(value ? value : title)">
  <md-icon md-font-icon="{{fontIcon}}" ng-if="fontIcon"></md-icon>
  <span class="che-toggle-title">{{title}}</span>
</md-button>
