private void OnNavigationClicked(NavigationType navigationType)
{
var grid = _container.GetItemsGrid();
var currentItemPos = DetectCurrentItemPos(grid);
var targetItem = NavigationUtil.GetTarget(grid,
currentItemPos, navigationType);
if (targetItem != null && !targetItem.IsBlockForInput)
{
FormModel.SelectedItem = targetItem.Model;
FormModel.SetChanges();
}
}