Setting a link, without a code to memorise:
- New "Do not link this image" tick box beside the URL field, in the media modal and in the attachment editor. It stores the same [none] marker underneath, so galleries built with the old plugin keep working and typing [none] by hand still does exactly what it always did.
- The link fields now sit in a box of their own in the sidebar of the full attachment editor, alongside every other attachment setting. They used to be laid out along the bottom of that screen in a table whose labels did not line up with their own fields, leaving the URL box floating above its label. Declared with show_in_edit => false, so the media modal is untouched.