Login required on modals

* adds new login_required_modal decorator
    * can be used before regular login_required decorator to return a proper session-timed-out message

intervention/views/revocation.py

@@ -14,7 +14,7 @@ from django.urls import reverse
 from intervention.forms.modals.revocation import NewRevocationModalForm, EditRevocationModalForm, \
     RemoveRevocationModalForm
 from intervention.models import Intervention, RevocationDocument, Revocation
-from konova.decorators import default_group_required, shared_access_required
+from konova.decorators import default_group_required, shared_access_required, login_required_modal
 from konova.utils.documents import get_document
 from konova.utils.message_templates import REVOCATION_ADDED, DATA_UNSHARED, REVOCATION_EDITED, REVOCATION_REMOVED
 
@@ -91,6 +91,7 @@ def edit_revocation_view(request: HttpRequest, id: str, revocation_id: str):
     )
 
 
+@login_required_modal
 @login_required
 @default_group_required
 @shared_access_required(Intervention, "id")