Intervention template adjustments

* renames intervention variable to obj to match other template style
* renames open routes to detail routes

intervention/forms/forms.py

@@ -269,7 +269,7 @@ class EditInterventionForm(NewInterventionForm):
         super().__init__(*args, **kwargs)
         if self.instance is not None:
             self.action_url = reverse("intervention:edit", args=(self.instance.id,))
-        self.cancel_redirect = reverse("intervention:open", args=(self.instance.id,))
+        self.cancel_redirect = reverse("intervention:detail", args=(self.instance.id,))
         self.form_title = _("Edit intervention")
         self.form_caption = ""