prevent undefined filterQuery error (#113522) (#113818)

Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>

Co-authored-by: Sergi Massaneda <sergi.massaneda@elastic.co>

x-pack/plugins/timelines/public/components/t_grid/helpers.tsx

@@ -228,23 +228,22 @@ export const getCombinedFilterQuery = ({
   to,
   filters,
   ...combineQueriesParams
-}: CombineQueries & { from: string; to: string }): string => {
-  return replaceStatusField(
+}: CombineQueries & { from: string; to: string }): string =>
+  replaceStatusField(
     combineQueries({
       ...combineQueriesParams,
       filters: [...filters, buildTimeRangeFilter(from, to)],
-    })!.filterQuery
+    })?.filterQuery
   );
-};
 
 /**
  * This function is a temporary patch to prevent queries using old `signal.status` field.
  * @todo The `signal.status` field should not be queried anymore and
  * must be replaced by `ALERT_WORKFLOW_STATUS` field name constant
  * @deprecated
  */
-const replaceStatusField = (query: string): string =>
-  query.replaceAll('signal.status', ALERT_WORKFLOW_STATUS);
+const replaceStatusField = (filterQuery?: string): string =>
+  filterQuery?.replaceAll('signal.status', ALERT_WORKFLOW_STATUS) ?? '';
 
 /**
  * The CSS class name of a "stateful event", which appears in both