Issue #3364945 by manuel.adan: Set private shortcut set name accordingly to the user context

src/PrivateShortcutSetStorage.php

@@ -96,7 +96,9 @@ class PrivateShortcutSetStorage extends ShortcutSetStorage implements PrivateSho
     else {
       $shortcut_set = $this->create([
         'id' => $set_id,
-        'label' => (string) $this->t("@user's private", ['@user' => ucfirst($account->getDisplayName())]),
+        'label' => $account->id() == $this->currentUser->id()
+          ? $this->t('Private')
+          : $this->t("User's private"),
       ]);
 
       $this->memoryCache->set($this->buildCacheId($set_id), $shortcut_set, MemoryCacheInterface::CACHE_PERMANENT, [$this->memoryCacheTag]);