### 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_all_items_tooltip = TTR("Select all visible font items.");
				select_full_items_tooltip = TTR("Select all visible font items and their data.");
				deselect_all_items_tooltip = TTR("Deselect all visible font items.");
				break;
			case Theme::DATA_TYPE_FONT_SIZE:
				select_items_icon = select_font_sizes_icon;
				select_items_label = select_font_sizes_label;
				deselect_all_items_button = deselect_all_font_sizes_button;
				select_all_items_button = select_all_font_sizes_button;
				select_full_items_button = select_full_font_sizes_button;
				total_selected_items_label = total_selected_font_sizes_label;
				items_title = TTR("Font sizes");
				select_all_items_tooltip = TTR("Select all visible font size items.");
				select_full_items_tooltip = TTR("Select all visible font size items and their data.");
				deselect_all_items_tooltip = TTR("Deselect all visible font size items.");
				break;
			case Theme::DATA_TYPE_ICON:
				select_items_icon = select_icons_icon;
				select_items_label = select_icons_label;
				deselect_all_items_button = deselect_all_icons_button;
				select_all_items_button = select_all_icons_button;
				select_full_items_button = select_full_icons_button;
				total_selected_items_label = total_selected_icons_label;
				items_title = TTR("Icons");
				select_all_items_tooltip = TTR("Select all visible icon items.");
				select_full_items_tooltip = TTR("Select all visible icon items and their data.");
				deselect_all_items_tooltip = TTR("Deselect all visible icon items.");
				break;
			case Theme::DATA_TYPE_STYLEBOX:
				select_items_icon = select_styleboxes_icon;