Merge branch 'cleanup_ui_registration' into 'django3_migration'

beat/web/ui/registration/admin.py

beat/web/ui/registration/docs/models.txt

beat/web/ui/registration/docs/overview.txt

beat/web/ui/registration/docs/views.txt

beat/web/ui/registration/forms.py

beat/web/ui/registration/migrations/0001_initial.py

beat/web/ui/registration/signals.py

...ation/templates/registration/blocked_user_reactivate.html

...tion/templates/registration/preregistration_complete.html

...stration/templates/registration/preregistration_form.html

...tration/templates/registration/registration_complete.html

...stration/templates/registration/registration_pending.html

beat/web/ui/registration/templatetags/registration_tags.py

beat/web/ui/registration/views.py