rder statistics ?") == true) {
          this.$.historyQuery.ref.child('order').remove()
          this.$.column.redraw()
          this.toastText = "notification-delete-successfully"
          this.$.toastAlert.open()
        }
      }

      resetWorkLevelStatistics() {
        if (confirm("Are you sure do you want to reset work level statistics ?") == true) {
          let t = [...Array(isLeapYear() ? 366 : 365)].map((_, i) => ({ 'level': 0, 'commit': 0, 'dayno': i + 1, 'date': dateFromDays(i + 1) }));
 