### 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

‮
parser->current_class = p_class;
	resolve_class_interface(p_class, p_source);
	GDScriptParser::DataType base_type = p_class->base_type;
	if (base_type.kind == GDScriptParser::DataType::CLASS) {
		GDScriptParser::ClassNode *base_class = base_type.class_type;
		resolve_class_body(base_class, p_class);
	}
	
	for (int i = 0; i < p_class->members.size(); i++) {
		GDScriptParser::ClassNode::Member member = p_class->members[i];
		if (member.type == GDScriptParser::ClassNode::Member::FUNCTION) {
			
			for (GDScriptParser::AnnotationNode *&E : member.function->annotations) {
				resolve_annotation(E);
				E->apply(parser, member.function);
			}
#ifdef DEBUG_ENABLED
			HashSet<uint32_t> previously_ignored = parser->ignored_warning_codes;
			for (uint32_t ignored_warning : member.function->ignored_warnings) {
				parser->ignored_warning_codes.insert(ignored_warning);
			}
#endif 
			resolve_function_body(member.function);
#ifdef DEBUG_ENABLED
			parser->ignored_warning_codes = previously_ignored;
#endif 
		} else if (member.type == GDScriptParser::ClassNode::Member::VARIABLE && member.variable->property != GDScriptParser::VariableNode::PROP_NONE) {
			if (member.variable->property == GDScriptParser::VariableNode::PROP_INLINE) {
				if (member.variable->getter != nullptr) {
					member.variable->getter->set_datatype(member.variable->datatype);