message: [fab] Add extra to list of columns
diff: @@ -209,7 +209,7 @@ class SqlMetricInlineView( # pylint: disable=too-many-ancestors
  add_title = _("Add Metric")
  edit_title = _("Edit Metric")
  - list_columns = ["metric_name", "verbose_name", "metric_type"]
  + list_columns = ["metric_name", "verbose_name", "metric_type", "extra"]
  edit_columns = [
  "metric_name",
  "description",
  