create implication partially_unzipped -> zipper

BUR #7674 has been rejected.

create implication partially_unzipped -> zipper

Seems straightforward. Unless it's used by posts that don't have any indication of a zipper drawn.

Related: forum #173420

This bulk update request is pending automatic rejection in 5 days.

This bulk update request has been rejected because it was not approved within 45 days.

The bulk update request #7674 (forum #198885) has been rejected by @DanbooruBot.