default layout sets legend trace order to normal to avoid spacings when show_value is true

Author: dbuezas

src/themed-layout.ts

@@ -79,7 +79,7 @@ export default function getThemedLayout(
   };
 
   return merge(
-    {},
+    { layout: { legend: { traceorder: "normal" } } },
     no_theme ? {} : theme,
     no_default_layout ? {} : defaultLayout
   );