public EditorDuo()
{
InitializeComponent();
Upper.Processed = false;
Lower.Processed = false;
Upper.CreationDate = default;
Lower.CreationDate = default;
Upper.ProcessedDate = default;
Lower.ProcessedDate = default;
Upper.SetDateStamp();
Lower.SetDateStamp();
TabOpened?.Invoke(this, EventArgs.Empty);
InputFocus();
}