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.
6 jobs for fix/section_item_list_manager in 0 seconds
Status Job ID Name Coverage
  External
failed ERP5.CodingStyleTest-TestRunner1

11:04:34

passed ERP5.PerformanceTest-TestRunner1

02:33:30

failed ERP5.UnitTest-TestRunner1

13:40:01

passed ERP5.CodingStyleTest-TestRunner1

02:19:25

passed ERP5.PerformanceTest-TestRunner1

00:23:38

failed ERP5.UnitTest-TestRunner1

02:45:08