KevS-SK2425-Revamp-Multisite-Module-1-clic-Multisite-configure-multisites

[Kazarus4]

FRFR doing with informations droped from Steeve and Emilien + staging link.

Awaiting las staging link to confirm content and do a proof by @benchbzh

Screens didn't make because I don't know if CSS will be updated in last minute