### 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

‮
if (found) {
				break;
			}
			if (script_class->identifier && script_class->identifier->name == first) {
				result = script_class->get_datatype();
				break;
			}
			if (script_class->members_indices.has(first)) {
				resolve_class_member(script_class, first, p_type);
				GDScriptParser::ClassNode::Member member = script_class->get_member(first);
				switch (member.type) {
					case GDScriptParser::ClassNode::Member::CLASS:
						result = member.get_datatype();
						found = true;
						break;
					case GDScriptParser::ClassNode::Member::ENUM:
						result = member.get_datatype();
						found = true;
						break;
					case GDScriptParser::ClassNode::Member::CONSTANT:
						if (member.get_datatype().is_meta_type) {
							result = member.get_datatype();
							found = true;
							break;
						} else if (Ref<Script>(member.constant->initializer->reduced_value).is_valid()) {
							Ref<GDScript> gdscript = member.constant->initializer->reduced_value;
							if (gdscript.is_valid()) {
								Ref<GDScriptParserRef> ref = get_parser_for(gdscript->get_script_path());
								if (ref->raise_status(GDScriptParserRef::INHERITANCE_SOLVED) != OK) {
									push_error(vformat(R"(Could not parse script from "%s".)", gdscript->get_script_path()), p_type);