### 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
select_items_label = select_colors_label;
				deselect_all_items_button = deselect_all_colors_button;
				select_all_items_button = select_all_colors_button;
				select_full_items_button = select_full_colors_button;
				total_selected_items_label = total_selected_colors_label;
				items_title = TTR("Colors");
				select_all_items_tooltip = TTR("Select all visible color items.");
				select_full_items_tooltip = TTR("Select all visible color items and their data.");
				deselect_all_items_tooltip = TTR("Deselect all visible color items.");
				break;
			case Theme::DATA_TYPE_CONSTANT:
				select_items_icon = select_constants_icon;
				select_items_label = select_constants_label;
				deselect_all_items_button = deselect_all_constants_button;
				select_all_items_button = select_all_constants_button;
				select_full_items_button = select_full_constants_button;
				total_selected_items_label = total_selected_constants_label;
				items_title = TTR("Constants");
				select_all_items_tooltip = TTR("Select all visible constant items.");
				select_full_items_tooltip = TTR("Select all visible constant items and their data.");
				deselect_all_items_tooltip = TTR("Deselect all visible constant items.");
				break;
			case Theme::DATA_TYPE_FONT:
				select_items_icon = select_fonts_icon;
				select_items_label = select_fonts_label;
				deselect_all_items_button = deselect_all_fonts_button;
				select_all_items_button = select_all_fonts_button;
				select_full_items_button = select_full_fonts_button;
				total_selected_items_label = total_selected_fonts_label;
				items_title = TTR("Fonts");