### 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_mode = ADD_VARIATION_BASE;
	add_type_dialog->set_title(TTR("Set Variation Base Type"));
	add_type_dialog->set_ok_button_text(TTR("Set Base Type"));
	add_type_dialog->set_include_own_types(true);
	add_type_dialog->popup_centered(Size2(560, 420) * EDSCALE);
}
void ThemeTypeEditor::_add_type_dialog_selected(const String p_type_name) {
	if (add_type_mode == ADD_THEME_TYPE) {
		select_type(p_type_name);
	} else if (add_type_mode == ADD_VARIATION_BASE) {
		_type_variation_changed(p_type_name);
	}
}
void ThemeTypeEditor::_notification(int p_what) {
	switch (p_what) {
		case NOTIFICATION_ENTER_TREE:
		case NOTIFICATION_THEME_CHANGED: {
			add_type_button->set_icon(get_theme_icon(SNAME("Add"), SNAME("EditorIcons")));
			data_type_tabs->set_tab_icon(0, get_theme_icon(SNAME("Color"), SNAME("EditorIcons")));
			data_type_tabs->set_tab_icon(1, get_theme_icon(SNAME("MemberConstant"), SNAME("EditorIcons")));
			data_type_tabs->set_tab_icon(2, get_theme_icon(SNAME("Font"), SNAME("EditorIcons")));
			data_type_tabs->set_tab_icon(3, get_theme_icon(SNAME("FontSize"), SNAME("EditorIcons")));
			data_type_tabs->set_tab_icon(4, get_theme_icon(SNAME("ImageTexture"), SNAME("EditorIcons")));
			data_type_tabs->set_tab_icon(5, get_theme_icon(SNAME("StyleBoxFlat"), SNAME("EditorIcons")));
			data_type_tabs->set_tab_icon(6, get_theme_icon(SNAME("Tools"), SNAME("EditorIcons")));
			type_variation_button->set_icon(get_theme_icon(SNAME("Add"), SNAME("EditorIcons")));
		} break;
	}
}
void ThemeTypeEditor::_bind_methods() {