### 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
bool has_theme_icon_override(const StringName &p_name) const;
	bool has_theme_stylebox_override(const StringName &p_name) const;
	bool has_theme_font_override(const StringName &p_name) const;
	bool has_theme_font_size_override(const StringName &p_name) const;
	bool has_theme_color_override(const StringName &p_name) const;
	bool has_theme_constant_override(const StringName &p_name) const;
	bool has_theme_icon(const StringName &p_name, const StringName &p_theme_type = StringName()) const;
	bool has_theme_stylebox(const StringName &p_name, const StringName &p_theme_type = StringName()) const;
	bool has_theme_font(const StringName &p_name, const StringName &p_theme_type = StringName()) const;
	bool has_theme_font_size(const StringName &p_name, const StringName &p_theme_type = StringName()) const;
	bool has_theme_color(const StringName &p_name, const StringName &p_theme_type = StringName()) const;
	bool has_theme_constant(const StringName &p_name, const StringName &p_theme_type = StringName()) const;
	float get_theme_default_base_scale() const;
	Ref<Font> get_theme_default_font() const;
	int get_theme_default_font_size() const;
	
	virtual Transform2D get_screen_transform() const override;
	Rect2i get_parent_rect() const;
	virtual DisplayServer::WindowID get_window_id() const override;
	Window();
	~Window();
};
VARIANT_ENUM_CAST(Window::Mode);
VARIANT_ENUM_CAST(Window::Flags);
VARIANT_ENUM_CAST(Window::ContentScaleMode);
VARIANT_ENUM_CAST(Window::ContentScaleAspect);
VARIANT_ENUM_CAST(Window::LayoutDirection);
VARIANT_ENUM_CAST(Window::WindowInitialPosition);
#endif