Include connection errors in exception handling

ref-test/app/editor/views.py

@@ -37,7 +37,7 @@ def _editor_console(id:str=None):
         dataset = Dataset.query.filter_by(id=id).first()
         datasets = Dataset.query.count()
         users = User.query.all()
-    except SQLAlchemyError as exception:
+    except (SQLAlchemyError, ConnectionError) as exception:
         write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
         return abort(500)
     if not dataset: