public SickLeaveSendingPage(SickLeave sickLeave, bool send = true)
        {
            InitializeComponent();
            this.sickLeave = sickLeave;


            User user = MainWindow.ReturnCurrentUser();

            if (send)
            {
                new Thread(() => Send(user)).Start();
            }
            else
            {
                Reporter.AddRaport(user.ReturnName(), "Wystawienie zwolnienia bez wysyłania", null);
                createPDF();
            }
        }