private void NewIngredientList_OnSelectionChanged(object sender, SelectionChangedEventArgs e)
{
NewIngredientDropDown.IsOpen = false;
if (e.AddedItems.Count == 0)
return;
var itemName = e.AddedItems[0].ToString();
_item.Ingredients.Add(new StockItem(itemName));
using (var dataStorage = new DataStorage())
_item.Ingredients.Last().Unit = dataStorage.StockItem(itemName).Unit;
StockDataGrid.Focus();
StockDataGrid.CurrentCell = new DataGridCellInfo(StockDataGrid.Items[StockDataGrid.Items.Count - 1], StockDataGrid.Columns[1]);
StockDataGrid.BeginEdit();
}