### 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_focusable(item_editor);
			icon_items_list->add_child(item_control);
		}
	}
	
	{
		for (int i = stylebox_items_list->get_child_count() - 1; i >= 0; i--) {
			Node *node = stylebox_items_list->get_child(i);
			node->queue_free();
			stylebox_items_list->remove_child(node);
		}
		if (leading_stylebox.pinned) {
			HBoxContainer *item_control = _create_property_control(Theme::DATA_TYPE_STYLEBOX, leading_stylebox.item_name, true);
			EditorResourcePicker *item_editor = memnew(EditorResourcePicker);
			item_editor->set_h_size_flags(SIZE_EXPAND_FILL);
			item_editor->set_stretch_ratio(1.5);
			item_editor->set_base_type("StyleBox");
			Button *pin_leader_button = memnew(Button);
			pin_leader_button->set_flat(true);
			pin_leader_button->set_toggle_mode(true);
			pin_leader_button->set_pressed(true);
			pin_leader_button->set_icon(get_theme_icon(SNAME("Pin"), SNAME("EditorIcons")));
			pin_leader_button->set_tooltip_text(TTR("Unpin this StyleBox as a main style."));
			item_control->add_child(pin_leader_button);
			pin_leader_button->connect("pressed", callable_mp(this, &ThemeTypeEditor::_on_unpin_leader_button_pressed));
			item_control->add_child(item_editor);
			if (edited_theme->has_stylebox(leading_stylebox.item_name, edited_type)) {
				item_editor->set_edited_resource(leading_stylebox.stylebox);
			} else {