Charpentier Lucas Indeed, I'm closing it. There's still an issue with the home page though: the columns. They're not editable using the WYSIWYG editor AFAIK. I think this is XWIKI-22027 (see also https://forum.xwiki.org/t/treat-div-elements-like-macros-in-the-wysiwyg-editor/14331).
Closing as invalid since the issue doesn't make sense anymore after XWIKI-13478
