### 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 (p_statement->type) {
		case Node::ASSERT:
			print_assert(static_cast<AssertNode *>(p_statement));
			break;
		case Node::VARIABLE:
			print_variable(static_cast<VariableNode *>(p_statement));
			break;
		case Node::CONSTANT:
			print_constant(static_cast<ConstantNode *>(p_statement));
			break;
		case Node::IF:
			print_if(static_cast<IfNode *>(p_statement));
			break;
		case Node::FOR:
			print_for(static_cast<ForNode *>(p_statement));
			break;
		case Node::WHILE:
			print_while(static_cast<WhileNode *>(p_statement));
			break;
		case Node::MATCH:
			print_match(static_cast<MatchNode *>(p_statement));