scroll: css for #10722

Missed adding to previous commit. Ref #10722

public/sass/components/_panel_dashlist.scss

@@ -22,7 +22,7 @@
     color: $orange;
     color: $orange;
   }
   }
 
 
-  &--no-margintop {
+  &--no-section-header {
     margin-top: 0;
     margin-top: 0;
   }
   }
 }
 }