Comment 4 for bug 1538678

Branch pushed here: http://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/khuckins/lp1538678-marc-editor-warning-prompt

This seems to work on the flat text editor and the regular editor, but certain fields outside the flat editor don't seem to play nice. Not entirely sure why this is yet