Selector buttons of Particle System Force Field, Plane Transform, Collider are misplaced under Trigger, Collision, and External Force modules, Refer to attached screenshot.

Steps to repro:
1. Create a new project
2. Hierarchy > Create > Effects > Particle System
3. Inspector > Particle System > Collision > Add List
4. Inspector > Trigger > Add List > Selector button

Actual Result:
Selector buttons are misplaced

Expected Result:
Selector buttons are aligned with the input field

Reproducible in:
2021.2.0a15, 2021.1.5f1, 2020.3.1f1, 2020.2.1f1, 2020.2.0a14

Working fine in:
2020.2.0a13, 2020.1.17f1

Environment:
Windows 10 and macOS10.14