### Godot version

v4.1.rc1.official [1f9e540f1]

### System information

Windows 10

### Issue description

Attempting to reorder the children of a TabContainer results in an unintended ordering and incorrect undo states.

Also happens in v4.0.3.stable.official [5222a99f5].

https://github.com/godotengine/godot/assets/3820082/2c2458e3-88ad-46d9-8a04-f289a049984a



### Steps to reproduce

1. Add a new TabContainer
2. Add a few children to it
3. Drag and drop to erroneously reorder them
4. Attempt to undo the change

### Minimal reproduction project

N/A
ERR_THREAD_GUARD_V(false);
	return data.grouped.has(p_identifier);
}
void Node::add_to_group(const StringName &p_identifier, bool p_persistent) {
	ERR_THREAD_GUARD
	ERR_FAIL_COND(!p_identifier.operator String().length());
	if (data.grouped.has(p_identifier)) {
		return;
	}
	GroupData gd;
	if (data.tree) {
		gd.group = data.tree->add_to_group(p_identifier, this);
	} else {
		gd.group = nullptr;
	}
	gd.persistent = p_persistent;
	data.grouped[p_identifier] = gd;
}
void Node::remove_from_group(const StringName &p_identifier) {