### 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
_remove_process_group();
			}
			data.process_thread_group_owner = nullptr;
			data.process_owner = nullptr;
			if (data.path_cache) {
				memdelete(data.path_cache);
				data.path_cache = nullptr;
			}
		} break;
		case NOTIFICATION_PATH_RENAMED: {
			if (data.path_cache) {
				memdelete(data.path_cache);
				data.path_cache = nullptr;
			}
		} break;
		case NOTIFICATION_READY: {
			if (GDVIRTUAL_IS_OVERRIDDEN(_input)) {
				set_process_input(true);
			}
			if (GDVIRTUAL_IS_OVERRIDDEN(_shortcut_input)) {
				set_process_shortcut_input(true);
			}
			if (GDVIRTUAL_IS_OVERRIDDEN(_unhandled_input)) {
				set_process_unhandled_input(true);
			}
			if (GDVIRTUAL_IS_OVERRIDDEN(_unhandled_key_input)) {
				set_process_unhandled_key_input(true);
			}
			if (GDVIRTUAL_IS_OVERRIDDEN(_process)) {
				set_process(true);