fix: App mode - renaming widgets on subgraphs (#10245)

## Summary

Fixes renaming of widgets from subgraph nodes in app builder/app mode.

## Changes

- **What**: If the widget is from a subgraph node and no parents passed,
use the node as the subgraph parent.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-10245-fix-App-mode-renaming-widgets-on-subgraphs-3276d73d3650815bb131c840df43cdf2)
by [Unito](https://www.unito.io)

src/utils/widgetUtil.ts

@@ -48,7 +48,10 @@ export function renameWidget(
   newLabel: string,
   parents?: SubgraphNode[]
 ): boolean {
-  if (isPromotedWidgetView(widget) && parents?.length) {
+  if (
+    isPromotedWidgetView(widget) &&
+    (parents?.length || node.isSubgraphNode())
+  ) {
     const sourceWidget = resolvePromotedWidgetSource(node, widget)
     if (!sourceWidget) {
       console.error('Could not resolve source widget for promoted widget')