private void ChooseCourseBtnClk(object sender, EventArgs e)
        {
            var example = new CourseGrid(this)
            {
                Dock = DockStyle.Fill, TopLevel = false, TopMost = true
            };

            if (!this.Parent.Controls.Contains(example))
            {
                this.NewGamePanel.Controls.Add(example);
                example.Show();
            }
        }