Any undocked window doesn't minimize on minimizing the unity editor.
When a window is opened and undocked, it doesn't minimize when the editor is minimized.

Steps To Reproduce
1. Create a new project
2. File > Build Settings
3. Click on Build setting window.
4. Minimize the editor.

Expected Result:
Build Settings window goes to minimize.

Observed Result:
Build Settings window Doesn't minimize with editor

Reproducible On:
2020.1.0a14, 2019.3.0b12, 2019.3.0b1, 2019.3.0a1,2018.3.0f2

Environment:
Occurs only on Mac