[Editor] Cogwheel icon is blurred at 150% or more scale in Timeline window

Steps to Repro:
1. Create a new Project
2. Hierarchy > right-click > 3D > Cube
3. Window > Sequencing > Timeline

Actual Result:
The cogwheel icon is blurred in Timeline window

Expected Result:
The icon shouldn't be blurred

Environment:
Windows Only

Occurring with:
2019.3.0a3

Note: The new icons are introduced in 2019.3.0a3