duplication in quick edit

Hi

you move ‘.inline-edit-coauthors’, by appending to ‘inline-edit-col-left’

I use Seopress plugin that insert others <fieldset class=”inline-edit-col-left”>, so the ‘.inline-edit-coauthors’ is appending for each.

I solved that, by sibling only the first fieldset :

co-authors-plus.js line 415
el.detach().appendTo( '.quick-edit-row .inline-edit-col-left:first-of-type .inline-edit-col' ).show();