Fix #164

Wino.Core.Domain/Interfaces/IFolderMenuItem.cs

@@ -8,6 +8,7 @@ namespace Wino.Core.Domain.Interfaces
     public interface IFolderMenuItem : IBaseFolderMenuItem
     {
         MailAccount ParentAccount { get; }
+        void UpdateParentAccounnt(MailAccount account);
     }
 
     public interface IMergedAccountFolderMenuItem : IBaseFolderMenuItem { }

Wino.Core/MenuItems/AccountMenuItem.cs

@@ -58,6 +58,16 @@ namespace Wino.Core.MenuItems
             Parameter = account;
             AccountName = account.Name;
             AttentionReason = account.AttentionReason;
+
+            if (SubMenuItems == null) return;
+
+            foreach (var item in SubMenuItems)
+            {
+                if (item is IFolderMenuItem folderMenuItem)
+                {
+                    folderMenuItem.UpdateParentAccounnt(account);
+                }
+            }
         }
 
         private void UpdateFixAccountIssueMenuItem()

Wino.Core/MenuItems/FolderMenuItem.cs

@@ -46,7 +46,7 @@ namespace Wino.Core.MenuItems
 
         public IEnumerable<IMailItemFolder> HandlingFolders => new List<IMailItemFolder>() { Parameter };
 
-        public MailAccount ParentAccount { get; }
+        public MailAccount ParentAccount { get; private set; }
 
         public string AssignedAccountName => ParentAccount?.Name;
 
@@ -71,5 +71,7 @@ namespace Wino.Core.MenuItems
         }
 
         public override string ToString() => FolderName;
+
+        public void UpdateParentAccounnt(MailAccount account) => ParentAccount = account;
     }
 }