Logintoboggan- Providing the one-time login link in an admin view
This is not an ideal way to do this, but since I am using the Panels module to display user profiles, I created a new variant for unverified users and added a piece of custom content on the variant (with a visibility rule restricting it to admin users) that showed the validation token.

Then I added a link on the view to the user profile; this is two steps instead of one, but at least it is a working solution.