FileDialog unable to be interacted with when launched from PopupWindow

Tested versions

• Reproducible in 4.2.2 stable and 4.3 stable, untested in other versions

System information

Godot v4.3.stable.mono - Windows 10.0.19045 - GLES3 (Compatibility) - Intel(R) UHD Graphics 620 (Intel Corporation; 25.20.100.6577) - Intel(R) Core(TM) i3-8130U CPU @ 2.20GHz (4 Threads)

Issue description

When launched from a PopupWindow, either directly or via callback, the FileDialog window cannot be closed, moved, or meaningfully interacted with.

Steps to reproduce

In the MRP, click the "save" button to directly launch the FileDialog window (this should work). Click the "save with popup" button to launch a PopupWindow which can launch the FileDialog. This FileDialog exhibits the strange behavior.

Minimal reproduction project (MRP)

FileDialogIssueMRP.zip