When prefab of Particle System is created, Shape Transform Tool goes out of Layout under "Shape" module from Particle System in prefab override window, refer attached screenshot.

Steps to reproduce:
1. Create a new project
2. Hierarchy > Create > Effects > Particle System
3. Make a Prefab of Particle System
4. Change in property in prefab
5. Click on Override > Select Particle System
6. Enable Shape module and expand

Actual Result:
Shape Transform Tool goes out of Layout

Expected Result:
Shape Transform Tool is visible clearly

Note: Shape Transform Tool is introduced in Unity 2019.1.0a8

Occurring on:
2020.2.0a10, 2020.1.0b7, 2019.3.12f1, 2019.2.13f1, 2019.1.11f1, 2019.1.0a8

Environment:
Windows10 and macOS 10.14