### 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
undo_redo->commit_action();
		} break;
		case TOOL_DUPLICATE: {
			if (!profile_allow_editing) {
				break;
			}
			if (!edited_scene) {
				break;
			}
			if (editor_selection->is_selected(edited_scene)) {
				current_option = -1;
				accept->set_text(TTR("This operation can't be done on the tree root."));
				accept->popup_centered();
				break;
			}
			if (!_validate_no_foreign()) {
				break;
			}
			List<Node *> selection = editor_selection->get_selected_node_list();
			if (selection.size() == 0) {
				break;
			}
			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			undo_redo->create_action(TTR("Duplicate Node(s)"), UndoRedo::MERGE_DISABLE, selection.front()->get());
			undo_redo->add_do_method(editor_selection, "clear");
			Node *dupsingle = nullptr;
			selection.sort_custom<Node::Comparator>();
			Node *add_below_node = selection.back()->get();
			for (Node *node : selection) {
				Node *parent = node->get_parent();