Generally in Koha we wrap submit and cancel controls in a separate fieldset: <fieldset class="action">. Sometimes this is nested inside the main form's fieldset and sometimes it isn't.
I would like to propose that we standardize on placing the fieldset outside the main form's fieldset. This will make it easier to keep form styles consistent.
I'm not sure how many templates will need to be updates so I'm making this an omnibus bug to help manage the complexity of patches.