### 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
Size2i content_scale_size;
	ContentScaleMode content_scale_mode = CONTENT_SCALE_MODE_DISABLED;
	ContentScaleAspect content_scale_aspect = CONTENT_SCALE_ASPECT_IGNORE;
	real_t content_scale_factor = 1.0;
	void _make_window();
	void _clear_window();
	void _update_from_window();
	void _update_viewport_size();
	void _update_window_size();
	void _propagate_window_notification(Node *p_node, int p_notification);
	void _update_window_callbacks();
	void _clear_transient();
	void _make_transient();
	Window *transient_parent = nullptr;
	Window *exclusive_child = nullptr;
	HashSet<Window *> transient_children;
	ThemeOwner *theme_owner = nullptr;
	Ref<Theme> theme;
	StringName theme_type_variation;
	bool bulk_theme_override = false;
	Theme::ThemeIconMap theme_icon_override;
	Theme::ThemeStyleMap theme_style_override;
	Theme::ThemeFontMap theme_font_override;
	Theme::ThemeFontSizeMap theme_font_size_override;
	Theme::ThemeColorMap theme_color_override;
	Theme::ThemeConstantMap theme_constant_override;
	mutable HashMap<StringName, Theme::ThemeIconMap> theme_icon_cache;
	mutable HashMap<StringName, Theme::ThemeStyleMap> theme_style_cache;
	mutable HashMap<StringName, Theme::ThemeFontMap> theme_font_cache;
	mutable HashMap<StringName, Theme::ThemeFontSizeMap> theme_font_size_cache;