### Godot version

3b086aa06

### System information

ArchLinux x11

### Issue description

```gdscript
extends Node

@export_group("My Properties")
@export var number = 3
@export var string = ""

@export_group("Prefixed Properties", "prefix_")
@export var prefix_number = 3
@export var prefix_string = ""

@export_group("", "")
@export var ungrouped_number = 3
```

![image](https://user-images.githubusercontent.com/70787919/214983963-528c415b-745b-47fc-9777-36ebe31a3060.png)


### Steps to reproduce

- create script
- @export_group
- go inspector

### Minimal reproduction project

‮
switch (kind) {
		case VARIANT:
			return "Variant";
		case BUILTIN:
			if (builtin_type == Variant::NIL) {
				return "null";
			}
			if (builtin_type == Variant::ARRAY && has_container_element_type()) {
				return vformat("Array[%s]", container_element_type->to_string());
			}
			return Variant::get_type_name(builtin_type);
		case NATIVE:
			if (is_meta_type) {
				return GDScriptNativeClass::get_class_static();
			}
			return native_type.operator String();
		case CLASS:
			if (is_meta_type) {
				return GDScript::get_class_static();
			}