We don't need any row classes anymore because the <body> already has a
maximum width. As for columns, we only have one column in this form, so
we don't need them either. Besides, the form's parent element already
has a padding.
So they follow the same convention used in proposals.
Note the styles are for elements which appear in the "new" view but not
in the "edit" view, so we only have to include them in one place.
