forms requires fieldset element in template

[bruno]

When doing custom templating for a form, you always have to write

<form>

<fieldset>

...

</fieldset>

</form>

IIRC this was not needed when I was doing some forms some months ago.

If there is no good reason for this <fieldset> requirement (which of course has a visual impact too), I'd like it to be dropped.

[mpo]

related (or in contradiction even?) with formarly reported #164