/// <summary>
/// Asettaa focuksen kontrollille jolla on pienin focusindex.
/// </summary>
public void FocusFirst()
{
List <Control> allControls = controlManager.AllControls()
.ToList();
focusManager.ChangeFocus(allControls.First(p => p.FocusIndex.X == allControls.Min(c => c.FocusIndex.X) &&
p.FocusIndex.Y == allControls.Min(c => c.FocusIndex.Y)));
}