public static void Pin()
        {
            Control?mainWindow = WindowingUtils.GetMainWindow();

            if (mainWindow is Window window)
            {
                window.Topmost = !window.Topmost;
            }
        }
        public DaysEditorViewModel(IEnumerable <WorkingDay>?days)
            : base(new ObservableCollection <WorkingDayViewModel>(days?.Select(d => new WorkingDayViewModel(d))))
        {
            var currentDay = Model?.FirstOrDefault(d => d.Date == DateTime.Today);

            currentDay ??= Model?.FirstOrDefault();
            if (!(currentDay is null))
            {
                SelectedDay = currentDay;
            }

            Add = ReactiveCommand.Create(() =>
            {
                var vm = new AddTaskViewModel();

                Observable
                .Merge(vm.Add, vm.Cancel.Select <Unit, WorkingTask?>(_ => null))
                .Take(1)
                .Subscribe(item =>
                {
                    if (item != null)
                    {
                        Log.Info("Created item {@Item}", item);
                        var itemVm = new WorkingTaskViewModel(item);
                        SelectedDay?.Tasks?.Add(item);
                        new MiniMainWindow(itemVm)
                        {
                            Owner = WindowingUtils.GetMainWindow() as Window     // hope it will be fixed some day https://github.com/AvaloniaUI/Avalonia/issues/3254
                        }.Show();
                    }
                });
                return(vm);
            });

            ShowElapsed = ReactiveCommand.Create(() =>
            {
                var vm = new TotalElapsedViewModel(SelectedDay?.Tasks ?? Enumerable.Empty <WorkingTask>());
                return(vm);
            });
        }