UI Builder Data Path Source List starts flickering and scrolling when trying to select the last item in the list

Steps to reproduce:

1. Open the attached project
2. Open testDocument.uxml in UI Builder
3. Select the Label element in the Hierarchy
4. Add Binding for the Text Value
5. Set Data Source to Type
6. Select TestUIBuilder Type
7. Open Data Source Path List
8. Scroll to the Bottom
9. Hover the Mouse Cursor just below the last item named "text"
10. Observe the Data Source Path List window

Actual results: The Data Source Path List window starts to flicker and scrolls up

Expected results: The Data Source Path List does not flicker when interacting with the bottom of the list

Reproducible with versions: 6000.0.59f1, 6000.2.8f1, 6000.3.0b6, 6000.4.0a2

Tested on (OS): macOS 26.0.1

Notes:

• The issue is most noticeable when the Data Source Path List contains a lot of entries and is scrollable. However, the flicker can be reproduced with few items as well