### 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

‮
if (is_base && !base.is_meta_type) {
						p_identifier->set_datatype(member.get_datatype());
						p_identifier->source = GDScriptParser::IdentifierNode::MEMBER_SIGNAL;
						return;
					}
				} break;
				case GDScriptParser::ClassNode::Member::FUNCTION: {
					if (is_base && !base.is_meta_type) {
						p_identifier->set_datatype(make_callable_type(member.function->info));
						return;
					}
				} break;
				case GDScriptParser::ClassNode::Member::CLASS: {
					reduce_identifier_from_base_set_class(p_identifier, member.get_datatype());
					return;
				}
				default: {
					
				}
			}
		}
		if (is_base) {
			is_base = script_class->base_type.class_type != nullptr;
			if (!is_base && p_base != nullptr) {
				break;
			}
		}
	}
	
	const StringName &native = base.native_type;