Describe the bug (current behavior)

With scroll the dropdown menu stays visible beyond the height of the scrollable div, even if the trigger gets out of the view .

Expected Behavior

The dropdown menu should not be visible if the trigger is not visible.

Link to minimal repro

https://stackblitz.com/edit/github-sogghk?file=src%2FItwinTree.tsx,src%2Fmain.tsx

Steps To Reproduce

1. Create a Tree with specific height , so that it becomes scrollable
2. Add dropdown menu on each tree nodes
3. Open any dropdown menu which gets out of the view on scroll
4. Observe that even if the trigger item is not present on the screen, the dropdown menu stays visible

Anything else?

No response