Tooltips are missing for the following properties in the Panel Settings Asset:
Dynamic Atlas Settings: Min/Max Atlas Size, Max Sub Texture Size, Active Filters
Clear Settings: Clear Color, Color Clear Value, Clear Depth Stencil

Steps to repro:
1. Create a new project.
2. Project > Create > UI Toolkit > Panel Settings Asset
3. Dynamic Atlas Settings > Hover mouse on all properties
4. Clear Settings > Hover mouse on all properties

Actual Result:
Tooltips are missing

Expected Result:
Tooltip appears when the mouse has hovered on the properties

Reproducible in:
2021.2.0a14, 2021.2.0a13

Working fine on:
2021.2.0a12, 2021.2.0a4

Note: Panel Settings Asset is introduced in Unity 2021.2.0a4

Environment:
Windows10 and macOS 10.15