### 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
int e_idx = 0;
		for (const StringName &E : theme_types) {
			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");
			}
			theme_type_list->add_icon_item(item_icon, E);
			if (E == edited_type) {
				theme_type_list->select(e_idx);
				item_reselected = true;
			}
			e_idx++;
		}
		if (!item_reselected) {
			theme_type_list->select(0);
			_list_type_selected(0);
		} else {
			_update_type_items();
		}
	} else {
		theme_type_list->set_disabled(true);
		theme_type_list->add_item(TTR("None"));
		edited_type = "";
		_update_type_items();
	}
	updating = false;
}
void ThemeTypeEditor::_update_type_list_debounced() {