//*******************************************************************
        // DESCRIPTION: Runs when 'Search Items' button is clicked.
        //              Creates an instance of SearchItemsPage, passing login-based user data.
        //              Creates an instance of ItemsWindow, passing the SearchItemsPage as parameter.
        //              The result is a new ItemsWindow with SearchItemsPage displayed.
        //*******************************************************************
        private void SearchItemsbutton_Click(object sender, RoutedEventArgs e)
        {
            Items_SearchItemsPage searchItemsPage = new Items_SearchItemsPage(arr);
            Items_Window          itemsWindow     = new Items_Window(searchItemsPage);

            itemsWindow.Show();
        }
        //*******************************************************************
        // DESCRIPTION: Runs when 'Prioritize By System' button is clicked.
        //              Creates an instance of PrioritizeBySystemPage, passing login-based user data.
        //              Creates an instance of ItemsWindow, passing the PrioritizeBySystemPage as parameter.
        //              The result is a new ItemsWindow with PrioritizeBySystemPage displayed.
        //*******************************************************************
        private void PrioritizeBySysbutton_Click(object sender, RoutedEventArgs e)
        {
            Items_PrioritizeBySystemPage prioritizeBySystem = new Items_PrioritizeBySystemPage(arr);
            Items_Window itemsWindow = new Items_Window(prioritizeBySystem);

            itemsWindow.Show();
        }