### 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
makevb = memnew(VBoxContainer);
	add_child(makevb);
	layout_names = memnew(ItemList);
	layout_names->set_auto_height(true);
	layout_names->set_custom_minimum_size(Size2(300 * EDSCALE, 50 * EDSCALE));
	layout_names->set_visible(true);
	layout_names->set_offset(SIDE_TOP, 5);
	layout_names->set_v_size_flags(Control::SIZE_EXPAND_FILL);
	layout_names->set_select_mode(ItemList::SELECT_MULTI);
	layout_names->set_allow_rmb_select(true);
	layout_names->connect("multi_selected", callable_mp(this, &EditorLayoutsDialog::_update_ok_disable_state).unbind(2));
	MarginContainer *mc = makevb->add_margin_child(TTR("Select existing layout:"), layout_names);
	mc->set_v_size_flags(Control::SIZE_EXPAND_FILL);
	name = memnew(LineEdit);
	makevb->add_child(name);
	name->set_placeholder(TTR("Or enter new layout name"));
	name->set_offset(SIDE_TOP, 5);
	name->set_anchor_and_offset(SIDE_LEFT, Control::ANCHOR_BEGIN, 5);
	name->set_anchor_and_offset(SIDE_RIGHT, Control::ANCHOR_END, -5);
	name->connect("gui_input", callable_mp(this, &EditorLayoutsDialog::_line_gui_input));
	name->connect("focus_entered", callable_mp(this, &EditorLayoutsDialog::_deselect_layout_names));
	name->connect("text_changed", callable_mp(this, &EditorLayoutsDialog::_update_ok_disable_state).unbind(1));
}
void EditorLayoutsDialog::set_name_line_enabled(bool p_enabled) {
	name->set_visible(p_enabled);
}