A submission requires a title and URL. It would be nice if we could paste in the URL and see a green checkmark if the URL is not an invalid dupe or a red x if t

A submission requires a title and URL. It would be nice if we could paste in the URL and see a green checkmark if the URL is not an invalid dupe or a red x if the URL is an invalid dupe. Then we don't have to copy and paste (and sometimes reformat) the title if the submission is an invalid dupe.