ISTWCMS-4874: add layout builder and latest version pages to fixed-width exemptions

uw_fdsu_theme_resp.theme

@@ -108,7 +108,12 @@ function uw_fdsu_theme_resp_preprocess_region(&$variables) {
 
     // If we are on not on a node, add appropriate classes to show
     // proper width.
-    if ($route_match->getRouteName() !== 'entity.node.canonical') {
+    $route_name = $route_match->getRouteName();
+    if (!in_array($route_name, [
+      'entity.node.canonical',
+      'entity.node.latest_version',
+      'layout_builder.overrides.node.view',
+      ])) {
       $variables['classes'][] = 'layout';
       $variables['classes'][] = 'uw-contained-width';
     }