erp5_xhtml_style: fixup: do not index xhtml style by default
Web Site/Section were still indexable when rendering in xhtml style.
See https://lab.nexedi.com/nexedi/erp5/commit/6c5db57bf97ce42b8a898ddc02d3d20f50d5833b
Web Site/Section were still indexable when rendering in xhtml style.
See https://lab.nexedi.com/nexedi/erp5/commit/6c5db57bf97ce42b8a898ddc02d3d20f50d5833b