### 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;
	if (!is_inside_tree() || !visible || updating_child_controls) {
		return;
	}
	updating_child_controls = true;
	call_deferred(SNAME("_update_child_controls"));
}
void Window::_update_child_controls() {
	if (!updating_child_controls) {
		return;
	}
	_update_window_size();
	updating_child_controls = false;
}
bool Window::_can_consume_input_events() const {
	return exclusive_child == nullptr;
}
void Window::_window_input(const Ref<InputEvent> &p_ev) {
	if (EngineDebugger::is_active()) {
		
		
		if (debugger_stop_shortcut.is_null()) {
			String shortcut_str = OS::get_singleton()->get_environment("__GODOT_EDITOR_STOP_SHORTCUT__");
			if (!shortcut_str.is_empty()) {
				Variant shortcut_var;
				VariantParser::StreamString ss;