Entry: add sort parameter archived

src/Wallabag/CoreBundle/Repository/EntryRepository.php

@@ -189,6 +189,8 @@ class EntryRepository extends EntityRepository
             $qb->orderBy('e.id', $order);
         } elseif ('updated' === $sort) {
             $qb->orderBy('e.updatedAt', $order);
+        } else if ('archived' === $sort) {
+            $qb->orderBy('e.archivedAt', $order);
         }
 
         $pagerAdapter = new DoctrineORMAdapter($qb, true, false);