### Godot version

4.1.1

### System information

linux

### Issue description

[simplescreenrecorder-2023-08-30_15.01.51.webm](https://github.com/godotengine/godot-proposals/assets/71937306/537d92b9-4f98-4fe6-adf4-71297be0471a)

I guess this wasn't the case before since I could save a layout named "2 monitors".

### Steps to reproduce

press space

### Minimal reproduction project

none
String default_type = p_type_name;
		if (edited_theme->get_type_variation_base(p_type_name) != StringName()) {
			default_type = edited_theme->get_type_variation_base(p_type_name);
		}
		(ThemeDB::get_singleton()->get_default_theme().operator->()->*get_list_func)(default_type, &names);
		names.sort_custom<StringName::AlphCompare>();
		for (const StringName &E : names) {
			items[E] = false;
		}
	}
	{
		names.clear();
		(edited_theme.operator->()->*get_list_func)(p_type_name, &names);
		names.sort_custom<StringName::AlphCompare>();
		for (const StringName &E : names) {
			items[E] = true;
		}
	}
	List<StringName> keys;
	for (const KeyValue<StringName, bool> &E : items) {
		keys.push_back(E.key);
	}
	keys.sort_custom<StringName::AlphCompare>();
	HashMap<StringName, bool> ordered_items;
	for (const StringName &E : keys) {
		ordered_items[E] = items[E];
	}
	return ordered_items;
}
HBoxContainer *ThemeTypeEditor::_create_property_control(Theme::DataType p_data_type, String p_item_name, bool p_editable) {