UI: Fixed get rule chains for entity list

ui-ngx/src/app/core/http/entity.service.ts

@@ -287,6 +287,11 @@ export class EntityService {
       case EntityType.OAUTH2_CLIENT:
         observable = this.oauth2Service.findTenantOAuth2ClientInfosByIds(entityIds, config);
         break;
+      case EntityType.RULE_CHAIN:
+        observable = this.getEntitiesByIdsObservable(
+          (id) => this.ruleChainService.getRuleChain(id, config),
+          entityIds);
+        break;
     }
     return observable;
   }