### 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
break;
		case Theme::DATA_TYPE_ICON:
			total_selected_items_label = total_selected_icons_label;
			break;
		case Theme::DATA_TYPE_STYLEBOX:
			total_selected_items_label = total_selected_styleboxes_label;
			break;
		case Theme::DATA_TYPE_MAX:
			return; 
	}
	if (!total_selected_items_label) {
		return;
	}
	int count = 0;
	for (const KeyValue<ThemeItem, ItemCheckedState> &E : selected_items) {
		ThemeItem ti = E.key;
		if (ti.data_type == p_data_type) {
			count++;
		}
	}
	if (count == 0) {
		total_selected_items_label->hide();
	} else {
		Array arr;
		arr.push_back(count);
		total_selected_items_label->set_text(TTRN("{num} currently selected", "{num} currently selected", count).format(arr, "{num}"));
		total_selected_items_label->show();
	}
}
void ThemeItemImportTree::_tree_item_edited() {