Missing group message

* adds group checker decorator for adding a message informing about missing group privileges

intervention/views.py

@@ -15,6 +15,7 @@ from konova.utils.user_checks import in_group
 
 
 @login_required
+@any_group_check
 def index_view(request: HttpRequest):
     """
     Renders the index view for Interventions
@@ -115,6 +116,7 @@ def new_document_view(request: HttpRequest, id: str):
 
 
 @login_required
+@any_group_check
 def open_view(request: HttpRequest, id: str):
     """ Renders a detail view for viewing an intervention's data