"Global Illumination" dropdown text overlap with a dropdown icon when the "Realtime" option is selected under Emission When Shader Graph is applied to Material, refer attached screenshot

Steps to repro:
1. Create a new project
2. Windows > Package Manager > Shader Graph(7.1.7) > Install
3. Project > Create > Shader > PBR Graph
4. Project > Create > Material
5. Assign "Shader Graph" to Material
6. Select Material > Inspector > Enable Emission
7. Global Illumination > Realtime

Actual Result:
"Realtime" text overlap with dropdown icon

Expected Result:
"Realtime" text visible clearly

Reproducible in:
2020.1.0a18, 2019.3.0f5, 2019.3.0a3

Working Fine in:
2019.3.0a2, 2019.2.13f1

Package found version: 7.1.7, 7.1.6, 7.1.1, 7.0.0, 6.9.0

Environment:
Windows 10 & macOS 10.14