[Bug]: document.hasFocus() returns true for all windows opened on startup

[bpasero]

Preflight Checklist

• I have read the Contributing Guidelines for this project.
• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

Electron Version

12.0.5

What operating system are you using?

macOS

Operating System Version

11.2.3

What arch are you using?

arm64 (including Apple Silicon)

Last Known Working Electron version

No response

Expected Behavior

document.hasFocus() is only true for the window that has focus.

Actual Behavior

Ever window reports document.hasFocus() to be true right after opening.

Testcase Gist URL

https://gist.github.com/16e6fc829febd0cab115dfd0850a31be

Additional Information

No response

[deepak1556]

It is a side-effect of #25292, where we put the webContents to focus after load url if it was not hidden on creation.