Merge branch '3494794-linksproptype-normalization-handle' into '2.0.x'

Issue #3494794 by grimreaper: LinksPropType normalization: handle in_active_trail

See merge request !304

src/Plugin/UiPatterns/PropType/LinksPropType.php

@@ -212,8 +212,13 @@ class LinksPropType extends PropTypePluginBase implements ContainerFactoryPlugin
     $options = $url->getOptions();
     self::setHrefLang($options);
     self::setActiveClass($options, $url);
+
+    if (isset($item['in_active_trail'])) {
+      $options['attributes']['data-drupal-active-trail'] = $item['in_active_trail'] ? 'true' : 'false';
+    }
+
     if (isset($options["attributes"])) {
-      $item = self:: mergeUrlAttributes($options["attributes"], $item);
+      $item = self::mergeUrlAttributes($options["attributes"], $item);
     }
     return $item;
   }