#50 Overlaying geometries KOM + OEK

* removes unused messages
* adds geometry conflict message rendering for KOM and OEK
* removes unused methods in GeoReferencedMixin
* generalizes geometrical lookup for conflicts from overlaps to intersects

intervention/models/intervention.py

@@ -266,10 +266,19 @@ class Intervention(BaseObject, ShareableObjectMixin, RecordableObjectMixin, Chec
             self.set_unchecked()
 
     def set_status_messages(self, request: HttpRequest):
+        """ Setter for different information that need to be rendered
+
+        Adds messages to the given HttpRequest
+
+        Args:
+            request (HttpRequest): The incoming request
+
+        Returns:
+            request (HttpRequest): The modified request
+        """
         if not self.is_shared_with(request.user):
             messages.info(request, DATA_UNSHARED_EXPLANATION)
-        request = self._set_overlapping_message(request)
-        request = self._set_overlapped_by_message(request)
+        request = self._set_geometry_conflict_message(request)
         return request