TF-4227 Set Back label button for when open email in Label

lib/features/mailbox/presentation/extensions/presentation_mailbox_extension.dart

@@ -2,6 +2,7 @@
 import 'package:core/presentation/resources/image_paths.dart';
 import 'package:flutter/material.dart';
 import 'package:jmap_dart_client/jmap/mail/email/keyword_identifier.dart';
+import 'package:labels/extensions/label_extension.dart';
 import 'package:model/extensions/presentation_mailbox_extension.dart';
 import 'package:model/mailbox/presentation_mailbox.dart';
 import 'package:tmail_ui_user/features/mailbox/presentation/model/presentation_label_mailbox.dart';
@@ -13,6 +14,10 @@ import 'package:tmail_ui_user/main/routes/route_utils.dart';
 extension PresentationMailboxExtension on PresentationMailbox {
 
   String getDisplayName(BuildContext context) {
+    if (this is PresentationLabelMailbox) {
+      return (this as PresentationLabelMailbox).label.safeDisplayName;
+    }
+
     if (isDefault) {
       switch(role!.value.toLowerCase()) {
         case PresentationMailbox.inboxRole:
@@ -44,6 +49,10 @@ extension PresentationMailboxExtension on PresentationMailbox {
   }
 
   String getDisplayNameWithoutContext(AppLocalizations appLocalizations) {
+    if (this is PresentationLabelMailbox) {
+      return (this as PresentationLabelMailbox).label.safeDisplayName;
+    }
+
     if (isDefault) {
       switch(role!.value.toLowerCase()) {
         case PresentationMailbox.inboxRole: