PanelMenu: Keyboard support not working

[glorindel]

Describe the bug

Right now accessiblity - keyboard support working only for headers but you cant get into the treenodes.
When you use it should focus treenode (but it always jump to next header):
"down arrow If panel is collapsed then moves focus to the next header, otherwise first treenode of the panel receives the focus."

You can try on any panelmenu on primereact.org

Reproducer

No response

System Information

"primereact": "^10.8.4",

System:
    OS: Windows 10 10.0.19045
    CPU: (6) x64 AMD EPYC 7302 16-Core Processor
    Memory: 19.23 GB / 36.00 GB
  Binaries:
    Node: 22.11.0 - C:\Program Files\nodejs\node.EXE
    npm: 10.9.0 - C:\Program Files\nodejs\npm.CMD
  Browsers:
    Chrome: 130.0.6723.117
    Edge: Chromium (130.0.2849.68)

Steps to reproduce the behavior

1. https://primereact.org/panelmenu/
2. use TABs to get on them panel menu header
3. using keyboard its not possible to focus on node items, it will jumps always on next header

Expected behavior

User should be able to use keys to navigate through every node in panel menu.