private void ClearAll()
        {
            var finishedTasks = m_Elements.Where(el => !el.dataSource.running).Select(el => el.dataSource.id).ToArray();

            foreach (var id in finishedTasks)
            {
                Progress.Clear(id);
            }
        }
        private static void DeleteButtonClicked(EventBase obj)
        {
            var sender = obj.target as Button;
            var ds     = sender?.userData as ProgressItem;

            if (ds != null)
            {
                Progress.Clear(ds.id);
            }
        }