### Godot version

4.0.3.stable

### System information

windows 11

### Issue description

fullscreen on the window node is not working and will show up as a windowed.

### Steps to reproduce

disable Embed Subwindows in Project Settings/Display/Window.
create a window node and set its mode to fullscreen.

### Minimal reproduction project

[fullscreen.zip](https://github.com/godotengine/godot/files/11821834/fullscreen.zip)
ERR_MAIN_THREAD_GUARD;
	wrap_controls = p_enable;
	if (!is_inside_tree()) {
		return;
	}
	if (updating_child_controls) {
		_update_child_controls();
	} else {
		_update_window_size();
	}
}
bool Window::is_wrapping_controls() const {
	ERR_READ_THREAD_GUARD_V(false);
	return wrap_controls;
}
Size2 Window::_get_contents_minimum_size() const {
	Size2 max;
	for (int i = 0; i < get_child_count(); i++) {
		Control *c = Object::cast_to<Control>(get_child(i));
		if (c) {
			Point2i pos = c->get_position();
			Size2i min = c->get_combined_minimum_size();
			max.x = MAX(pos.x + min.x, max.x);
			max.y = MAX(pos.y + min.y, max.y);
		}
	}
	return max;
}
void Window::child_controls_changed() {