Outline Tolerance value is clipped on dragging the slider in Sprite Editor window

Steps to repro:
1. Open the attached project.
2. Select "Test" sprite in the Project window.
3. Open Sprite Editor window > Select Custom Physics Shape.
4. Change the Outline Tolerance value using slider.

Actual Result:
Outline Tolerance value is clipped.

Expected Result:
Outline Tolerance value is not clipped.

Reproducible in:
2020.1.0a5, 2020.1.0a2, 2019.3.0b4, 2019.3.0b2.

Working fine in:
2020.1.0a1, 2019.3.0b1.

Environment:
Windows & Mac.