Prevent mistakenly adding "portal" to existing internal users through the portal wizard as that can lead to odd behaviors (to the extent that since 12.0 the "user type" uses radio buttons so it's not possible to easily set a user as both internal and portal). closes odoo/odoo#65981 X-original-commit: 8105902c4f6f467facad728ccd9763b7a44002bc Signed-off-by: Martin Trigaux (mat) <mat@odoo.com>