Vertical scrollbar doesn't work on scrolling mouse button as well as dragging the scroll handle upwards or downwards, However it works when up and down arrow buttons are clicked.

Steps to repro:
1. Create a new project.
2. Window > Package Manager > Probuilder(preview.2 - 4.3.0) > Install
3. Tools > ProBuilder > ProBuilder Window
4. Create "New Shape"
5. Open "UV Editor" window
6. Actions > Covert to Auto > try to scroll panel info using mouse scroll handle or buttons

Actual Result:
Vertical scrollbar is not working on the scrolling mouse button

Expected Result:
Vertical scrollbar works with mouse scrollbar button as well as dragging the handle

Workaround: Scrollbar scrolls when up and down arrow buttons are clicked.

Occurring on:
2020.1.0a24 with ProBuilder package version: preview.2 - 4.3.0, 4.2.3, 4.2.1

Working Fine on:
2020.1.0a23, 2019.3.2f1 with ProBuilder package version: preview.2 - 4.3.0, 4.2.3, 4.2.1

Environment:
Occurs only on Windows 10