old_contents: from django.apps import AppConfig
  from django.contrib.admin.apps import AdminConfig
  from django.contrib.auth.apps import AuthConfig
  from django.contrib.contenttypes.apps import ContentTypesConfig
  from django.contrib.sessions.apps import SessionsConfig
  from django.db.models.signals import post_migrate, pre_migrate
  
  from geotrek.common.utils.signals import pm_callback, check_srid_has_meter_unit
  
  
  class GeotrekConfig(AppConfig):
      """
      Base class to handle table move on right schemas, and load SQL files
      !! WARNING !! need to create subclass in geotrek.myapp.apps for project apps,
      and create subclasses here for external subclasses
      """
      def __init__(self, *args, **kwargs):
          pre_migrate.connect(check_srid_has_meter_unit, sender=self, dispatch_uid='geotrek.core.checksrid')
          super(GeotrekConfig, self).__init__(*args, **kwargs)
  
      def ready(self):
          post_migrate.connect(pm_callback, sender=self, dispatch_uid='geotrek.core.movetoschemas')
  
  
  class AuthGeotrekConfig(AuthConfig, GeotrekConfig):
      """
      bind for django.contrib.auth
      """
      pass
  
  
  class ContenttypeGeotrekConfig(GeotrekConfig, ContentTypesConfig):
      """
      bind for django.contrib.contenttype
      """
      pass
  
  
  class SessionsGeotrekConfig(SessionsConfig, GeotrekConfig):
      pass
  
  
  class AdminGeotrekConfig(GeotrekConfig, AdminConfig):
      pass
  
new_contents: from django.apps import AppConfig
  from django.contrib.admin.apps import AdminConfig
  from django.contrib.auth.apps import AuthConfig
  from django.contrib.contenttypes.apps import ContentTypesConfig
  from django.contrib.sessions.apps import SessionsConfig
  from django.db.models.signals import post_migrate, pre_migrate
  
  from geotrek.common.utils.signals import pm_callback, check_srid_has_meter_unit
  
  
  class GeotrekConfig(AppConfig):
      """
      Base class to handle table move on right schemas, and load SQL files
      !! WARNING !! need to create subclass in geotrek.myapp.apps for project apps,
      and create subclasses here for external subclasses
      """
      def __init__(self, *args, **kwargs):
          pre_migrate.connect(check_srid_has_meter_unit, sender=self, dispatch_uid='geotrek.core.checksrid')
          super(GeotrekConfig, self).__init__(*args, **kwargs)
  
      def ready(self):
          post_migrate.connect(pm_callback, sender=self, dispatch_uid='geotrek.core.movetoschemas')
  
  
  class AuthGeotrekConfig(GeotrekConfig, AuthConfig):
      """
      bind for django.contrib.auth
      """
      pass
  
  
  class ContenttypeGeotrekConfig(GeotrekConfig, ContentTypesConfig):
      """
      bind for django.contrib.contenttype
      """
      pass
  
  
  class SessionsGeotrekConfig(GeotrekConfig, SessionsConfig):
      pass
  
  
  class AdminGeotrekConfig(GeotrekConfig, AdminConfig):
      pass
  
subject: Revert "fix translations"