Disable form validation more thoroughly
Expands on r67283 by not using any HTML5 input types either, except
search. Otherwise you'd still have problems when changing integer
fields in Special:Preferences, say. Sad, since in Opera it had a cute
little widget for incrementing/decrementing, and types like email have
some neat effects on platforms like the iPhone (see
<http://diveintohtml5.org/forms.html#type-email>). But there's no other
way to disable the constraints these impose without using JS, and given
how broken WebKit is right now . . .