How to reproduce:
1. Open the project "case_1205028-MinMaxGradient"
2. Open the Scene "BugScene"
3. Select the GameObject "GameObject" in the Hierarchy window
4. Click on the button that changes modes of the "Broken Min Max Gradient Field" in the Inspector window
5. Click next to the button that changes modes of the "Broken Min Max Gradient Field" in the Inspector window

Expected results: the clickable area matches the button area that changes modes of the "Broken Min Max Gradient Field"
Actual results: the clickable area is next to the button that changes modes of the "Broken Min Max Gradient Field"

Reproducible with: 2018.4.14f1, 2019.2.16f1, 2019.3.0f4, 2020.1.0a17

Could not test with: 2017.4 because MinMaxGradient cannot be serialized with the attribute