On bug 65317 [1] it is suggested that the preferences page should have buttons aligned to the right and should be ordered so constructive is the last. I've written a fix for this and I would appreciate some code review.
This had me wondering, should this apply to all forms? e.g. the editing form
If so I think we probably need to get this into the style guide in some form, detailing how buttons should be ordered. We may want to introduce mw-ui-button-group or mw-ui-form-button-group.