### 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

‮
return (p_this->*(p_this->valid_annotations[name].apply))(this, p_target);
}
bool GDScriptParser::AnnotationNode::applies_to(uint32_t p_target_kinds) const {
	return (info->target_kind & p_target_kinds) > 0;
}
bool GDScriptParser::validate_annotation_argument_count(AnnotationNode *p_annotation) {
	ERR_FAIL_COND_V_MSG(!valid_annotations.has(p_annotation->name), false, vformat(R"(Annotation "%s" not found to validate.)", p_annotation->name));
	const MethodInfo &info = valid_annotations[p_annotation->name].info;
	if (((info.flags & METHOD_FLAG_VARARG) == 0) && p_annotation->arguments.size() > info.arguments.size()) {
		push_error(vformat(R"(Annotation "%s" requires at most %d arguments, but %d were given.)", p_annotation->name, info.arguments.size(), p_annotation->arguments.size()));
		return false;
	}
	if (p_annotation->arguments.size() < info.arguments.size() - info.default_arguments.size()) {
		push_error(vformat(R"(Annotation "%s" requires at least %d arguments, but %d were given.)", p_annotation->name, info.arguments.size() - info.default_arguments.size(), p_annotation->arguments.size()));
		return false;
	}
	return true;
}
bool GDScriptParser::tool_annotation(const AnnotationNode *p_annotation, Node *p_node) {
	this->_is_tool = true;
	return true;
}
bool GDScriptParser::icon_annotation(const AnnotationNode *p_annotation, Node *p_node) {