Bug 18887 changed the item form so that the labels aligned to the right, being closer to the input field and easier to read. In 18.11.x this is no longer the case.
It looks like this might have been lost in or before the conversion to SCSS - Owen, could you maybe have a look? I am not where to add it in the scss - is there a specific sequence in the file?
The labels have been moved back to the right meanwhile :)