cubicweb-faq #2981434 Improve breadcrumbs [validation pending]

So that the FAQSection appears in the breadcrumbs of a FAQuestion.

This was the case in the old schema, just resurtect it.

prioritynormal
typeenhancement
done in0.2.0
load0.100
load left0.000
closed by#9f3063fc2628 Add FAQSection in the FAQuestion breadcrumbs (back again after schema rewrite).
patchAdd FAQSection in the FAQuestion breadcrumbs (back again after schema rewrite). [applied]