Elgg-Lorea-Hydra/mod/file_tools/actions/groups/save_sort.php

<?php

$guid = get_input("guid");
if ($entity = get_entity($guid)) {
	if ($entity instanceof ElggGroup && $entity->canEdit()) {
		$sort = get_input("sort");
		$sort_direction = get_input("sort_direction");
		
		$entity->file_tools_sort = $sort;
		$entity->file_tools_sort_direction = $sort_direction;
		
		forward($entity->getURL());
	}
}

forward(REFERER);