private void btnOK_Click(object sender, EventArgs e)
        {
            try
            {
                BoardSettings = BoardMapper.GetBoardFromOtomataUrl(txtUrl.Text);

                DialogResult = System.Windows.Forms.DialogResult.OK;
                this.Close();
            }
            catch (Exception)
            {
                MessageBox.Show("Unable to parse otomata url");
            }
        }