BlendTree Preview speed slider value is clipped in the Inspector, refer attached screenshot.

Steps to repro:
1. Create a new project.
2. Project Window > Create > Animator Controller
3. Double click on the "new Animator Controller"
4. Right-click the graph area and select "Create State > From new Blend Tree"
5. Double click on the "Blend Tree" node
6. Select "BlendTree" node in Animator Window
7. Change Slider value of BlendTree Preview in the Inspector

Note: Multiplier icon is introduced in Unity 2019.3.0b4 and 2020.1.0a5

Actual Result:
BlendTree Preview speed slider value is clipped

Expected Result:
BlendTree Preview Slider value and multiplier icon is visible clearly

Reproducible in:
2019.3.0b7, 2019.3.0b4

Working fine on:
2020.1.0a9

Environment:
Windows 10 & Mac 10.14