TF-3847 Fix blank user avatar on Stalwart server

Signed-off-by: dab246 <tdvu@linagora.com>

lib/features/mailbox/presentation/base_mailbox_view.dart

@@ -34,9 +34,7 @@ abstract class BaseMailboxView extends GetWidget<MailboxController>
       final dashboardController = controller.mailboxDashBoardController;
       final accountId = dashboardController.accountId.value;
       final session = dashboardController.sessionCurrent;
-      final username = accountId != null
-          ? dashboardController.getOwnEmailAddress()
-          : '';
+      final username = dashboardController.ownEmailAddress.value;
 
       final linagoraApps = dashboardController
           .appGridDashboardController

lib/features/mailbox/presentation/mailbox_controller.dart

@@ -1229,7 +1229,7 @@ class MailboxController extends BaseMailboxController
       case MailboxActions.copySubaddress:
         try{
           final subaddress = getSubAddress(
-            mailboxDashBoardController.getOwnEmailAddress(),
+            mailboxDashBoardController.ownEmailAddress.value,
             findNodePathWithSeparator(mailbox.id, '.')!,
           );
           copySubAddressAction(context, subaddress);
@@ -1247,7 +1247,7 @@ class MailboxController extends BaseMailboxController
       case MailboxActions.allowSubaddressing:
         try{
           final subAddress = getSubAddress(
-            mailboxDashBoardController.getOwnEmailAddress(),
+            mailboxDashBoardController.ownEmailAddress.value,
             findNodePathWithSeparator(mailbox.id, '.')!,
           );
           openConfirmationDialogSubAddressingAction(

lib/features/mailbox/presentation/widgets/user_information_widget.dart

@@ -11,7 +11,7 @@ typedef OnSubtitleClick = void Function();
 
 class UserInformationWidget extends StatelessWidget {
 
-  final String userName;
+  final String ownEmailAddress;
   final String? subtitle;
   final EdgeInsetsGeometry? titlePadding;
   final OnSubtitleClick? onSubtitleClick;
@@ -20,7 +20,7 @@ class UserInformationWidget extends StatelessWidget {
 
   const UserInformationWidget({
     Key? key,
-    required this.userName,
+    required this.ownEmailAddress,
     this.subtitle,
     this.titlePadding,
     this.onSubtitleClick,
@@ -35,7 +35,7 @@ class UserInformationWidget extends StatelessWidget {
       decoration: BoxDecoration(border: border),
       child: Row(children: [
         UserAvatarBuilder(
-          username: userName.firstLetterToUpperCase,
+          username: ownEmailAddress.firstLetterToUpperCase,
           size: 51,
           textStyle: ThemeUtils.textStyleInter500().copyWith(
             fontSize: 25.5,
@@ -49,7 +49,7 @@ class UserInformationWidget extends StatelessWidget {
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
             SelectableText(
-              userName,
+              ownEmailAddress,
               maxLines: 1,
               style: ThemeUtils.defaultTextStyleInterFont.copyWith(
                 fontSize: 17,