[xhtml form renderer] fix html structure, move header where we are sure to display it when necesary (_render_fields not displayed if main form has no visible fields
#! /bin/sh -e#if [ "$1" = remove -o "$1" = upgrade ]; then if which install-docs >/dev/null 2>&1; then install-docs -r cubicweb-doc fifi#DEBHELPER#exit 0