_onCardClick() {
        var showContentCard = this.state.contentCardAnimation == "hideAnim";
        if (showContentCard == true) {
            this._animateIconCard(!showContentCard);
        } else {
            this._animateContentCard(showContentCard);
        }
    }
Attached callback to the onClick event of this control. We then
animate in / out either the Icon or Content card correspondingly.