feat(user): complete growth level chain

functions.php

@@ -444,6 +444,9 @@ if (class_exists('\AKSRT\User\BadgesAdmin')) {
 if (class_exists('\AKSRT\User\Level')) {
     \AKSRT\User\Level::get_instance()->init();
 }
+if (class_exists('\AKSRT\User\LevelAdmin')) {
+    \AKSRT\User\LevelAdmin::get_instance()->init();
+}
 if (class_exists('\AKSRT\User\Metrics')) {
     \AKSRT\User\Metrics::get_instance()->init();
 }