message: fix null check for condition threshold to allow 0 values
diff: @@ -1201,8 +1201,11 @@ const AlertReportModal: FunctionComponent<AlertReportModalProps> = ({
  name="threshold"
  disabled={conditionNotNull}
  value={
  - currentAlert && currentAlert.validator_config_json
  - ? currentAlert.validator_config_json.threshold || ''
  + currentAlert &&
  + currentAlert.validator_config_json &&
  + currentAlert.validator_config_json.threshold !==
  + undefined
  + ? currentAlert.validator_config_json.threshold
  : ''
  }
  placeholder={t('Value')}
  