fieldset and inline ordering enums

contracts/admin.py

contracts/migrations/0015_alter_contract_options.py

...ons/0016_alter_contractee_options_alter_signee_options.py

contracts/migrations/0017_alter_contract_options.py

...igrations/0018_contractee_created_by_signee_created_by.py

contracts/models.py

registry/templates/admin/change_form.html

shared/admin.py

shared/templatetags/admin_extras.py

users/models.py