public IActionResult List([FromQuery] int?page)
{
Pager @pager;
var todos = _taskDispatcher.ListToDo();
@pager = new Pager(todos.Count(), page ?? 1, 20);
ViewData["pager"] = @pager;
var shownTodos = todos.Skip(@pager.PageSkip).Take(@pager.PageSize).ToList();
ViewData["ToDo"] = shownTodos;
ViewData["Doing"] = _taskDispatcher.ListDoing();
return(View("List"));
}