### Godot version

v4.0.beta12.mono.official [3c9bf4bc2]

### System information

Windows 10, Forward+ (Vulkan), NVIDIA GeForce RTX 3070 (526.98)

### Issue description

The `Initial Screen` select dropdown provides 64 options for monitors when it should only provide options for what is available.  In my case, I'm only using two monitors so there should only be two monitors to choose from (excluding the Primary Monitor option of course).  Screenshot below.

![image](https://user-images.githubusercontent.com/1691061/213066149-b97d3220-9b23-4685-a155-ad2f48f96de3.png)


### Steps to reproduce

The issue appears to occur whether I'm using two monitors or one monitor.

---
1. Open `Project Settings`
2. Go to `Display` > `Window` > `Size`
3. Select the `Initial Screen` dropdown.
4. You will see the `Primary Monitor` option and 64 other monitor options as seen in the screenshot.

### Minimal reproduction project

N/A
static Engine *engine = nullptr;
static ProjectSettings *globals = nullptr;
static Input *input = nullptr;
static InputMap *input_map = nullptr;
static TranslationServer *translation_server = nullptr;
static Performance *performance = nullptr;
static PackedData *packed_data = nullptr;
static Time *time_singleton = nullptr;
#ifdef MINIZIP_ENABLED
static ZipArchive *zip_packed_data = nullptr;
#endif
static FileAccessNetworkClient *file_access_network_client = nullptr;
static MessageQueue *message_queue = nullptr;
static AudioServer *audio_server = nullptr;
static DisplayServer *display_server = nullptr;
static RenderingServer *rendering_server = nullptr;
static CameraServer *camera_server = nullptr;
static XRServer *xr_server = nullptr;
static TextServerManager *tsman = nullptr;
static PhysicsServer3DManager *physics_server_3d_manager = nullptr;
static PhysicsServer3D *physics_server_3d = nullptr;
static PhysicsServer2DManager *physics_server_2d_manager = nullptr;
static PhysicsServer2D *physics_server_2d = nullptr;
static NavigationServer3D *navigation_server_3d = nullptr;
static NavigationServer2D *navigation_server_2d = nullptr;
static ThemeDB *theme_db = nullptr;
static bool _start_success = false;
String tablet_driver = "";
String text_driver = "";
String rendering_driver = "";