[Bug]: showOpenDialog does not attach to parentWindow on GTK / GNOME

[anuejn]

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

14.0.0

What operating system are you using?

Other Linux

Operating System Version

NixOs 21.11

What arch are you using?

x64

Last Known Working Electron version

13.5.0

Expected Behavior

When I open a dialog with showOpenDialog and pass a parentWindow as the first argument, the dialog should be attached to the parent window blocking any interaction with the underlaying window.

Actual Behavior

since version 14, a seperate, freestanding window is created. It is not attached to the parent window.
this also applies to showSaveDialog

Testcase Gist URL

No response

Additional Information

this might be related to #19159

[anuejn]

Closing this in favour of #32857.
#32857 describes the exact same issue