Comment 12 for bug 1538678

I've taken a new look at this, and pushed up a fix here: https://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/khuckins/lp1538678-no-warning-prompt-marc-editor

This works by setting up a watcher in the marcedit directive for dirty input. Previously it was only in the cataloging app.js, and specific to instances containing an opac iframe.