core: support Manager user in Base_getDialogSectionCategoryItemList
Base_getDialogSectionCategoryItemList was supporting the case of users from zodb_users plugin, but not the case of ERP5 users with roles set from zodb_roles.
It's a more and more common case to make manager users using a "normal" ERP5 user as person (so that we can reset password etc) and to give Manager role by zodb_roles, but this was not supported by this script.