### 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)
return;
		}
		if (PowerSetRequest(power_request, POWER_REQUEST_TYPE::PowerRequestSystemRequired) == 0) {
			print_error("Failed to request system sleep override.");
			return;
		}
		if (PowerSetRequest(power_request, POWER_REQUEST_TYPE::PowerRequestDisplayRequired) == 0) {
			print_error("Failed to request display timeout override.");
			return;
		}
	} else {
		PowerClearRequest(power_request, POWER_REQUEST_TYPE::PowerRequestSystemRequired);
		PowerClearRequest(power_request, POWER_REQUEST_TYPE::PowerRequestDisplayRequired);
		CloseHandle(power_request);
		power_request = nullptr;
	}
	keep_screen_on = p_enable;
}
bool DisplayServerWindows::screen_is_kept_on() const {
	return keep_screen_on;
}
Vector<DisplayServer::WindowID> DisplayServerWindows::get_window_list() const {
	_THREAD_SAFE_METHOD_
	Vector<DisplayServer::WindowID> ret;
	for (const KeyValue<WindowID, WindowData> &E : windows) {
		ret.push_back(E.key);
	}
	return ret;
}
DisplayServer::WindowID DisplayServerWindows::get_window_at_screen_position(const Point2i &p_position) const {