The gizmo dropdown list button in Scene view and Game view does not collapse the list after expanding it. Clicking anywhere else closes the list.
Refer to the attached video.

Steps to Reproduce:
1. Create a New Project
2. Scene View > Gizmo > Dropdown > Expand

Actual result:
Gizmo dropdown menu does not collapse

Expected result:
Gizmo dropdown menu should collapse the same way it expands

Occurring on:
2020.1.0a24, 2020.1.0a22

Working Fine on:
2020.1.0a21, 2019.3.3f1

Environment:
Windows 10 and macOS 10.14, 10.15