### 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

‮
r_static = true;
		}
		return valid;
	}
	return false;
}
bool GDScriptAnalyzer::function_signature_from_info(const MethodInfo &p_info, GDScriptParser::DataType &r_return_type, List<GDScriptParser::DataType> &r_par_types, int &r_default_arg_count, bool &r_static, bool &r_vararg) {
	r_return_type = type_from_property(p_info.return_val);
	r_default_arg_count = p_info.default_arguments.size();
	r_vararg = (p_info.flags & METHOD_FLAG_VARARG) != 0;
	r_static = (p_info.flags & METHOD_FLAG_STATIC) != 0;
	for (const PropertyInfo &E : p_info.arguments) {
		r_par_types.push_back(type_from_property(E, true));
	}
	return true;
}
void GDScriptAnalyzer::validate_call_arg(const MethodInfo &p_method, const GDScriptParser::CallNode *p_call) {
	List<GDScriptParser::DataType> arg_types;
	for (const PropertyInfo &E : p_method.arguments) {
		arg_types.push_back(type_from_property(E, true));
	}
	validate_call_arg(arg_types, p_method.default_arguments.size(), (p_method.flags & METHOD_FLAG_VARARG) != 0, p_call);
}
void GDScriptAnalyzer::validate_call_arg(const List<GDScriptParser::DataType> &p_par_types, int p_default_args_count, bool p_is_vararg, const GDScriptParser::CallNode *p_call) {
	if (p_call->arguments.size() < p_par_types.size() - p_default_args_count) {
		push_error(vformat(R"*(Too few arguments for "%s()" call. Expected at least %d but received %d.)*", p_call->function_name, p_par_types.size() - p_default_args_count, p_call->arguments.size()), p_call);
	}
	if (!p_is_vararg && p_call->arguments.size() > p_par_types.size()) {
		push_error(vformat(R"*(Too many arguments for "%s()" call. Expected at most %d but received %d.)*", p_call->function_name, p_par_types.size(), p_call->arguments.size()), p_call->arguments[p_par_types.size()]);
	}