### 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
data.ready_notified = true;
	data.blocked++;
	for (KeyValue<StringName, Node *> &K : data.children) {
		K.value->_propagate_ready();
	}
	data.blocked--;
	notification(NOTIFICATION_POST_ENTER_TREE);
	if (data.ready_first) {
		data.ready_first = false;
		notification(NOTIFICATION_READY);
		emit_signal(SceneStringNames::get_singleton()->ready);
	}
}
void Node::_propagate_enter_tree() {
	
	if (data.parent) {
		data.tree = data.parent->data.tree;
		data.depth = data.parent->data.depth + 1;
	} else {
		data.depth = 1;
	}
	data.viewport = Object::cast_to<Viewport>(this);