### Godot version

4.0

### System information

Windows 11

### Issue description

So on my monitor with 2560x1440 resolution retrieved by the `DisplayServer.get_window_size` method shows 2562x1442, which I think is incorrect. A similar result returned by `get_viewport().size`. But it's become correct if the `Resizable` property is turned on.

![image](https://user-images.githubusercontent.com/3036176/212492776-5c09b12e-d25a-4951-8392-54f5a5e3bece.png)


### Steps to reproduce

Create the project, add a label to observe the resolution text, set the full-screen mode in the project settings, toggle off the `Resizable` property, and run the project.

### Minimal reproduction project

[TestResolution.zip](https://github.com/godotengine/godot/files/10418682/TestResolution.zip)

#include "display_server_windows.h"
#include "core/io/marshalls.h"
#include "core/math/geometry_2d.h"
#include "main/main.h"
#include "os_windows.h"
#include "scene/resources/texture.h"
#include <avrt.h>
#include <dwmapi.h>
#ifndef DWMWA_USE_IMMERSIVE_DARK_MODE
#define DWMWA_USE_IMMERSIVE_DARK_MODE 20
#endif
#if defined(GLES3_ENABLED)
#include "drivers/gles3/rasterizer_gles3.h"
#endif
#if defined(__GNUC__)
#define GetProcAddress (void *)GetProcAddress
#endif
static String format_error_message(DWORD id) {
	LPWSTR messageBuffer = nullptr;
	size_t size = FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
			nullptr, id, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPWSTR)&messageBuffer, 0, nullptr);
	String msg = "Error " + itos(id) + ": " + String::utf16((const char16_t *)messageBuffer, size);
	LocalFree(messageBuffer);
	return msg;
}
static void track_mouse_leave_event(HWND hWnd) {