private void EditSelectedItemClick(object sender, EventArgs e)
        {
            var selectedItem = itemListView.SelectedItems[0];
            var editItemForm = new EditItemForm(selectedItem);

            editItemForm.StartPosition = FormStartPosition.CenterParent;
            var result = editItemForm.ShowDialog();

            if (result == DialogResult.OK)
            {
                itemListView.ForceDraw();
            }
        }
        private void OnItemAdd(Item copyOfItemToAdd)
        {
            var editItemForm = new EditItemForm(copyOfItemToAdd);

            editItemForm.StartPosition = FormStartPosition.CenterParent;
            var result = editItemForm.ShowDialog();

            if (result == DialogResult.OK)
            {
                AddItemOrStackExistingOne(copyOfItemToAdd);
                itemListView.ForceDraw();
            }
        }