Type dropdown text overlaps with its icon on selecting "Small Icon" OR "Large Icon" option in the "Notification icons" list under "Mobile Notification Settings" from "Project Settings" window, refer attached screenshot

Steps to repro:
1. Create a new project.
2. Window > Package Manager > Mobile Notifications (preview.5 - 1.0.4)
3. Edit > Project Settings > Mobile Notification Settings
4. Add icon in the "Notification icons" list
5. Type > Small Icon OR Large Icon

Actual Result:
Type dropdown text overlaps with its dropdown icon

Expected Result:
Type dropdown text visible clearly

Occurring in:
2020.1.0a15, 2019.3.0f2

Package version found: preview.5 - 1.0.4, 1.0.3, 1.0.2, 1.0.0

Environment:
Windows 10 & macOS 10.14.