Scrolling the expanded Packages list causes the Package version to overlap with the Package Manager Menu (Install Packages, Packages, and Sort drop-down) inside the Package Manager window, refer to the attached video.

Steps to repro:
1. Create a new project
2. Edit > Project Settings > Package Manager > Enable Pre-release Packages checkbox
3. Window > Package Manager > Packages: Unity Registry
4. Expand the Release candidate package dropdown
5. Scroll the list downwards direction

Actual Result:
The package version is overlapping with the Package Manager Tools Menu

Expected Result:
Package version should not overlap with Package Manager Tools Menu

Reproducible in:
2021.2.0a17, 2021.2.0a8

Working fine in:
2021.2.0a7, 2021.2.0a1

Environment:
Occurring on Windows 10 & macOS 10.15.