### 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

‮
operation->operation = BinaryOpNode::OP_ADDITION;
			operation->variant_op = Variant::OP_ADD;
			break;
		case GDScriptTokenizer::Token::MINUS:
			operation->operation = BinaryOpNode::OP_SUBTRACTION;
			operation->variant_op = Variant::OP_SUBTRACT;
			break;
		case GDScriptTokenizer::Token::STAR:
			operation->operation = BinaryOpNode::OP_MULTIPLICATION;
			operation->variant_op = Variant::OP_MULTIPLY;
			break;
		case GDScriptTokenizer::Token::SLASH:
			operation->operation = BinaryOpNode::OP_DIVISION;
			operation->variant_op = Variant::OP_DIVIDE;
			break;
		case GDScriptTokenizer::Token::PERCENT:
			operation->operation = BinaryOpNode::OP_MODULO;
			operation->variant_op = Variant::OP_MODULE;
			break;
		case GDScriptTokenizer::Token::STAR_STAR:
			operation->operation = BinaryOpNode::OP_POWER;
			operation->variant_op = Variant::OP_POWER;
			break;
		case GDScriptTokenizer::Token::LESS_LESS:
			operation->operation = BinaryOpNode::OP_BIT_LEFT_SHIFT;
			operation->variant_op = Variant::OP_SHIFT_LEFT;
			break;
		case GDScriptTokenizer::Token::GREATER_GREATER:
			operation->operation = BinaryOpNode::OP_BIT_RIGHT_SHIFT;
			operation->variant_op = Variant::OP_SHIFT_RIGHT;