stopMoving(event, ui) {
    const _this = this
    ui.item.removeClass('moving')
    if (_this.doCancel) {
      if (ui.sender) {
        $(ui.sender).sortable('cancel')
      }
      this.from.closest('.frmb-control').sortable('cancel')
    }
    _this.save()
    _this.doCancel = false
  }
Callback for when a drag ends

@param  {Object} event
@param  {Object} ui