RemoveModalForm refactoring

* wraps generic request processing logic into RemoveModalForm
* adds delete action to intervention detail compensations.html
* fixes rendering of deleted compensations in intervention detail view

intervention/views.py

@@ -124,7 +124,13 @@ def open_view(request: HttpRequest, id: str):
 
     """
     template = "intervention/detail/view.html"
+
+    # Fetch data, filter out deleted related data
     intervention = get_object_or_404(Intervention, id=id)
+    compensations = intervention.compensations.filter(
+        deleted_on=None,
+        deleted_by=None,
+    )
     has_access = intervention.has_access(user=request.user)
 
     geom_form = SimpleGeomForm(
@@ -133,6 +139,7 @@ def open_view(request: HttpRequest, id: str):
 
     context = {
         "intervention": intervention,
+        "compensations": compensations,
         "has_access": has_access,
         "geom_form": geom_form,
     }