### Godot version

4.1.dev (dc625bcbfc5b587ba8867481ee7a1f6a567c25d0)

### System information

Mageia 9, Linux

### Issue description

When importing a project in current `master`, the following error is raised for each asset that gets imported:
```
Attempting to parent and popup a dialog that already has a parent.
```

It seems to be raised once per asset, caused by the progress dialog.

CC @bruvzg

### Steps to reproduce

- Import a new project in Godot that contains importable assets, e.g. https://github.com/RPicster/godot4-demo-desert-light

### Minimal reproduction project

See above.
ERR_READ_THREAD_GUARD_V(String());
	return title;
}
void Window::set_initial_position(Window::WindowInitialPosition p_initial_position) {
	ERR_MAIN_THREAD_GUARD;
	initial_position = p_initial_position;
	notify_property_list_changed();
}
Window::WindowInitialPosition Window::get_initial_position() const {
	ERR_READ_THREAD_GUARD_V(WINDOW_INITIAL_POSITION_ABSOLUTE);
	return initial_position;
}
void Window::set_current_screen(int p_screen) {