Text to go in the release notes:
This enhancement adds the ability to redirect users back to where they were when using the modal type logins in place of an action that requires login on the OPAC.
Example: On the OPAC detail page you can add comments if logged in. Prior to this patch, clicking the link to add a comment prior to being logged in would expose the login modal and then re-direct you to your OPAC user page, and thus lose the context of your action. With this enhancement, you are redirected back to the record you were looking at and can then post your comment.