private void BtnManageQuestions_Click(object sender, RoutedEventArgs e)
        {
            ManageQAs manageQAs = new ManageQAs(QAMode.Question);

            manageQAs.ShowDialog();
        }
        private void BtnManageAnswers_Click(object sender, RoutedEventArgs e)
        {
            ManageQAs manageQAs = new ManageQAs(QAMode.Answer);

            manageQAs.ShowDialog();
        }