Reinject should reuse initial injection's placement logic

On Dawn, initial injection correctly places the size chart on the Size option row. But when "Enable reinject" re-adds the chart after Dawn re-renders the product form on a variant change, it lands on the first option row instead (Shirt Length, in my case).

The CSS selector setting can't work around this because Dawn gives all variant option rows identical classes, so there's no way to target the Size row specifically.

Please make reinject remember and reuse the placement from the initial injection. I'm currently using a custom theme script to reposition the chart after each reinject, which I'd love to be able to delete.