[BUG] Clear Session doesn't clear all TreeNode's child

[NghiaTranUIT]

Description

• Clear Session only clears all flows, but not the TreeNode's child from the Left Panel

https://github.com/ProxymanApp/proxyman-windows-linux/assets/5878421/75cfb717-1bc6-4882-8cd6-e05244ad7817

Steps to Reproduce

1. Pin some domains or wildcard domains (e.g. *.com)
2. Make a lot of requests
3. See there are requests in *.com
4. Click the Clear Session Button

Current Behavior

• It clears the flows, but not the child nodes from the left panel (See Video)
• It still shows the > arrow

Expected Behavior

• [ ] Consistent with the macOS behavior, it will clear all sub-nodes
• [ ] Make sure it doesn't break current logic (https://github.com/ProxymanApp/proxyman-windows-linux/issues/368)