Can't use QRESYNC for iCloud.

[bkaankose]

Describe the bug
Even though the server capabilities return QuickResync flag for the iCloud's IMAP server, and EnableQuickResyncAsync or EnableQuickResync succeeds after authentication, using OpenAsync override with uidValidity throws InvalidOperationException with a message "The QRESYNC extension has not been enabled." for iCloud.

Platform (please complete the following information):

• OS: Windows
• .NET Framework: netstandard 2.1
• MailKit Version: 4.9.0

Exception
"The QRESYNC extension has not been enabled."

   at MailKit.Net.Imap.ImapFolder.QueueOpenCommand(FolderAccess access, UInt32 uidValidity, UInt64 highestModSeq, IList`1 uids, CancellationToken cancellationToken)
   at MailKit.Net.Imap.ImapFolder.OpenAsync(FolderAccess access, UInt32 uidValidity, UInt64 highestModSeq, IList`1 uids, CancellationToken cancellationToken)
   at Wino.Core.Synchronizers.ImapSync.QResyncSynchronizer.<HandleSynchronizationAsync>d__1.MoveNext() in D:\GitHub\Wino-Mail\Wino.Core\Synchronizers\ImapSync\QResyncSynchronizer.cs:line 67

Expected behavior
EnableQuickResyncAsync/EnableQuickResync should activate QRESYNC for the ImapClient properly if the server capabilities supports it.