//private ContextClass _renovationStrategy = new ContextClass();
        public WindowProstorije(UpravnikWindow parent)
        {
            InitializeComponent();
            this._parent = parent;
            UpdateTable();

            this.DataContext = this;
        }
        public LekoviWindow(UpravnikWindow parent)
        {
            InitializeComponent();
            this._parent = parent;
            UpdateTable();

            this.DataContext = this;
            SastojciLeka.Items.Clear();
        }