ISTWCMS-4199: preprocessing site_name to be available in header

uw_fdsu_theme_resp.theme

@@ -69,6 +69,10 @@ function uw_fdsu_theme_resp_preprocess_region(&$variables) {
     // The class that is used for the header.
     $variables['classes'][] = 'uw-header';
 
+    // Get the site name for placing inside the menu.
+    $config = \Drupal::config('system.site');
+    $variables['site_name'] = $config->get('name');
+
     $variables['faculty'] = theme_get_setting('wcms_colour_scheme', 'uw_fdsu_theme_resp') ? theme_get_setting('wcms_colour_scheme', 'uw_fdsu_theme_resp') : 'org-default';
   }
 }