message: fix: reindex when combine metric in legacy pivot table
diff: @@ -936,7 +936,7 @@ class PivotTableViz(BaseViz):
  # Display metrics side by side with each column
  if self.form_data.get("combine_metric"):
  - df = df.stack(0).unstack()
  + df = df.stack(0).unstack().reindex(level=-1, columns=metrics)
  return dict(
  columns=list(df.columns),
  html=df.to_html(
  