Update multiple membership doesn't set is_override
Membership status rules can be set as "Administrator Only". By doing this, status won't be changed by the process_membership scheduled job anymore, but can only be changed with the is_override option by an administrator. This makes sense e.g. for a custom status as "expelled" or "excluded". When I want to change the membership status to "excluded", I have to use the is_override option, and the field is_override in civicrm_membership is set to "1".
However, when I update several memberships at once with the action "Update multiple memberships" (via profile) to "excluded", the status is changed correctly. But is_override isn't changed, so that with the next run of the scheduled job "process_membership", the status will be updated again according to the status rules - which is not what we want!
Instead, when changing a membership status which is marked "Administrator Only", the field "is_override" should be set automatically - the same way it would be done when I change 1 membership manually.