Base view/transclusion of translated titles on the presence of an "fr-title" field

Transclusion/view of an optional (but recommended) `fr-title` field allows more uses (title rendering through ViewTemplate, Tables of Content, Timelines, or Searches).

We initially tried to expand the use of the optional `caption` field to view and transclude translated titles as well, but it was pushing the envelope, as the role of the `caption` field had mostly been to get a shorter label in case of need (like in tabs).