<span style="font-size:1.5em;" ng-switch on="value">
        <i ng-switch-when="true" class="fa fa-check fa-fw" title="{{trueTitle}}" style="color:#018c24;"></i>
        <i ng-switch-default class="fa fa-times fa-fw" title="{{falseTitle}}" style="color:#b31414;"></i>
</span>
