async public override void RefreshList()
{
// Groups
Group[] groups = await APIHandler.TeacherGetGroups();
// List
if (list != null)
{
list.Dispose();
}
list = new ListPanel(this.parent.Width, groups, typeof(GroupListItem));
list.Location = new Point(0, 35);
list.Width = this.parent.Width;
list.Height = this.parent.Height - 35;
this.Controls.Add(list);
}