### 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
add_type_options->clear();
	List<StringName> names;
	ThemeDB::get_singleton()->get_default_theme()->get_type_list(&names);
	if (include_own_types) {
		edited_theme->get_type_list(&names);
	}
	names.sort_custom<StringName::AlphCompare>();
	Vector<StringName> unique_names;
	for (const StringName &E : names) {
		
		if (!p_filter.is_subsequence_ofn(String(E))) {
			continue;
		}
		
		if (unique_names.has(E)) {
			continue;
		}
		unique_names.append(E);
		Ref<Texture2D> item_icon;
		if (E == "") {
			item_icon = get_theme_icon(SNAME("NodeDisabled"), SNAME("EditorIcons"));
		} else {
			item_icon = EditorNode::get_singleton()->get_class_icon(E, "NodeDisabled");
		}
		add_type_options->add_item(E, item_icon);
	}
}
void ThemeTypeDialog::_add_type_filter_cbk(const String &p_value) {