I did do the edit to adm-cats, before I saw your query.
It worked perfectly.
( I prowled around in adm-misc as well, but didn't try an edit, since it had a xenforo call, and with my rudimentary php reading, couldn't see how a cut would matter. )
Making nice strides on my tweaked xenforo integration, BTW. I'll post a url and send you login when I'm closer to going live.
(Of course I have other issues cropping up, but will post them where appropriate, after I run another set of browser checks. )