Further fixes

* fixes race condition on geometry conflict calculation if performed in background process
* simplifies access to smaller buffered geometry
* adds mapping of "qm"->"m2" for UnitChoice in API usage for backwards compatibility

api/utils/serializer/v1/ema.py

@@ -13,7 +13,7 @@ from codelist.settings import CODELIST_CONSERVATION_OFFICE_ID, CODELIST_HANDLER_
 from ema.models import Ema
 from intervention.models import Responsibility, Handler
 from konova.models import Geometry
-from konova.tasks import celery_update_parcels
+from konova.tasks import celery_update_parcels, celery_check_for_geometry_conflicts
 from user.models import UserActionLogEntry
 
 
@@ -122,6 +122,7 @@ class EmaAPISerializerV1(AbstractModelAPISerializerV1, AbstractCompensationAPISe
         obj.users.add(user)
 
         celery_update_parcels.delay(obj.geometry.id)
+        celery_check_for_geometry_conflicts.delay(obj.geometry.id)
 
         return obj.id