_onTouchEnd(evt) {
      if (!this._mouseOrTouchDown) {
        return;
      }
      this._mouseOrTouchDown = false;
      evt.preventDefault();
      if (this.disabled || this._selectedValue === -1) {
        return;
      }
      if (!this._cancelTouchOut) {
        this._changeValueAnimation(this._selectedValue);
      }
    }
TouchEnd/MouseUp event handler.

@param {event} evt Event object