Asset selector buttons for the properties in the Inspector tab is misaligned and placed slightly to the right side, refer attached screenshots

Steps to repro:
1. Create a new project.
2. Hierarchy > Directional light > Inspector
3. Select Cookie OR Flare selector button

Actual Result:
Asset Selector button is misaligned in the Inspector and placed slightly to the right side.

Expected Result:
Asset Selector button should be aligned with properties

Occurring in:
2020.2.0a14

Working fine in:
2020.2.0a13, 2020.1.0b12

Environment:
Windows10 and macOS 10.14