TF-2323 Use position to load more emails when sort by Subject & Sender

Signed-off-by: dab246 <tdvu@linagora.com>
(cherry picked from commit 847a56bfd331dc29f05493a861fb6f21da2b2cde)

lib/features/thread/domain/model/get_email_request.dart

@@ -3,15 +3,16 @@ import 'package:jmap_dart_client/jmap/account_id.dart';
 import 'package:jmap_dart_client/jmap/core/filter/filter.dart';
 import 'package:jmap_dart_client/jmap/core/properties/properties.dart';
 import 'package:jmap_dart_client/jmap/core/session/session.dart';
+import 'package:jmap_dart_client/jmap/core/sort/comparator.dart';
 import 'package:jmap_dart_client/jmap/core/unsigned_int.dart';
 import 'package:jmap_dart_client/jmap/mail/email/email.dart';
-import 'package:jmap_dart_client/jmap/core/sort/comparator.dart';
 import 'package:tmail_ui_user/features/thread/domain/model/filter_message_option.dart';
 
 class GetEmailRequest with EquatableMixin {
   final Session session;
   final AccountId accountId;
   final UnsignedInt? limit;
+  final int? position;
   final Set<Comparator>? sort;
   final Filter? filter;
   final FilterMessageOption? filterOption;
@@ -23,6 +24,7 @@ class GetEmailRequest with EquatableMixin {
     this.accountId,
     {
       this.limit,
+      this.position,
       this.sort,
       this.filter,
       this.filterOption,
@@ -36,6 +38,7 @@ class GetEmailRequest with EquatableMixin {
     session,
     accountId,
     limit,
+    position,
     sort,
     filter,
     properties,