Since https://github.com/odoo/odoo/pull/73689 all internal users are no longer known at init. Unlike what was stated in the corresponding PR, the code of mentions wasn't actually good enough to allow it without any drawback. This PR fixes the issue by prioritizing internal users on the result of the RPC. As a bonus the internal user state is immediately returned when fetching followers, which allows mentions to be accurate even before the RPC is done. task-2695224 closes odoo/odoo#80645 X-original-commit: 86de2f231be87b289deb85c3b20b93d890cce918 Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>