TF-3189 new option to enable/disable subaddressing for a personal folder

lib/features/mailbox/data/extensions/mailbox_cache_extension.dart

@@ -20,7 +20,8 @@ extension MailboxCacheExtension on MailboxCache {
         unreadThreads: unreadThreads != null ? UnreadThreads(UnsignedInt(unreadThreads!)) : null,
         myRights: myRights?.toMailboxRights(),
         isSubscribed: isSubscribed != null ? IsSubscribed(isSubscribed!) : null,
-        namespace: namespace != null ? Namespace(namespace!) : null
+        namespace: namespace != null ? Namespace(namespace!) : null,
+        rights: rights != null ? Map<String, List<String>?>.from(rights!) : null,
     );
   }
 }

lib/features/mailbox/data/extensions/mailbox_extension.dart

@@ -17,7 +17,8 @@ extension MailboxExtension on Mailbox {
       unreadThreads: unreadThreads?.value.value.round(),
       myRights: myRights?.toMailboxRightsCache(),
       isSubscribed: isSubscribed?.value,
-      namespace: namespace?.value
+      namespace: namespace?.value,
+      rights: rights?.map((key, value) => MapEntry(key, value)),
     );
   }
 }