[Editor] Decimal values are clipped on moving keyframe manually in Timeline window

Steps to Repro:
1. Create a new Project
2. Hierarchy > right-click > 3D > Cube
3. Window > Sequencing > Timeline
4. Create some animation
5. Move key frame manually

Actual Result:
Decimal values are not shown

Expected Result:
Decimal values should be shown

Environment:
Windows Only

Occurring with:
2019.3.0a3

Working fine on:
2019.3.0a2, 2019.2.0b2

Environment: Mac and Windows