Gestion des pieds de documents en mode XML/3/en

Principle

The idea is to embed the document footer into a group or text areas. In fact, the objects containing the document footer must be either text areas (text objects), or groups, as they must be handled by the program after the group is executed potentially generating a page jump. These objects will be conditioned on the "not triggering" of a page jump. Concretely, these objects will only appear if the current page does not generate a page jump, which means they will only appear on the last page of the document.