private void UserControl_Loaded(object sender, RoutedEventArgs e)
        {
            TrayViewModel viewModel = TaskbarIcon.GetParentTaskbarIcon(this).DataContext as TrayViewModel;

            if (viewModel != null)
            {
                viewModel.ConnectedSessions = null;
            }
        }
        private void listSessions_MouseDoubleClick(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            Session item = ((FrameworkElement)e.OriginalSource).DataContext as Session;

            if (item == null)
            {
                return;
            }

            TrayViewModel vm = DataContext as TrayViewModel;

            vm.TriggerSessionCommand.Execute(item);
        }