### 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

‮
List<GDScriptParser::DataType> par_types;
			int default_arg_count = 0;
			bool is_static = false;
			bool is_vararg = false;
			if (get_function_signature(p_for->list, false, list_type, CoreStringNames::get_singleton()->_iter_get, return_type, par_types, default_arg_count, is_static, is_vararg)) {
				variable_type = return_type;
				variable_type.type_source = list_type.type_source;
			} else if (!list_type.is_hard_type()) {
				variable_type.kind = GDScriptParser::DataType::VARIANT;
			} else {
				push_error(vformat(R"(Unable to iterate on object of type "%s".)", list_type.to_string()), p_for->list);
			}
		} else if (list_type.builtin_type == Variant::ARRAY || list_type.builtin_type == Variant::DICTIONARY || !list_type.is_hard_type()) {
			variable_type.kind = GDScriptParser::DataType::VARIANT;
		} else {
			push_error(vformat(R"(Unable to iterate on value of type "%s".)", list_type.to_string()), p_for->list);
		}
	}
	if (p_for->variable) {
		p_for->variable->set_datatype(variable_type);
	}
	resolve_suite(p_for->loop);
	p_for->set_datatype(p_for->loop->get_datatype());
#ifdef DEBUG_ENABLED
	if (p_for->variable) {
		is_shadowing(p_for->variable, R"("for" iterator variable)");
	}
#endif
}
void GDScriptAnalyzer::resolve_while(GDScriptParser::WhileNode *p_while) {