[BUG] isNodesCollapsed end nodes are invisible

[guyluz11]

Bug Description / 버그 설명

In MindMapWidget when setting isNodesCollapsed to true and then back to false only one layer is getting expanded.
I want all my tree to expend, not just the nodes connected to the root node.

Steps to Reproduce / 재현 단계

1. Add MindMapWidget(isNodesCollapsed: isNodesCollapsed, to your code.
2. Make the variable isNodesCollapsed = true;
3. Make a button that turns it to false isNodesCollapsed = false;

Expected Behavior / 예상 동작

All the tree nodes are expanding.

Actual Behavior / 실제 동작

Only the nodes connected to the root of the tree are on the screen.

Package Version / 패키지 버전

1.2.2

Flutter Version / Flutter 버전

3.32.5

Platform / 플랫폼

Android

Code Sample / 코드 샘플

Error Logs / 에러 로그

Additional Context / 추가 정보

No response