ConnectionListener's closed not invoked when connection is lost

[mnlipp]

When the IMAP server closes a connection while the IdleManager is waiting (watching), the ConnectionListener's closed is not invoked.

Here's a stack trace from this condition:

DEBUG IMAP: IdleManager got exception for folder: imap://xxxxxxxx/INBOX, THROW: 
jakarta.mail.FolderClosedException: * BYE Jakarta Mail Exception: java.net.SocketException: Connection reset
	at org.eclipse.angus.mail.imap.IMAPFolder.handleIdle(IMAPFolder.java:3309)
	at org.eclipse.angus.mail.imap.IdleManager.processKeys(IdleManager.java:351)
	at org.eclipse.angus.mail.imap.IdleManager.select(IdleManager.java:262)
	at org.eclipse.angus.mail.imap.IdleManager.access$200(IdleManager.java:111)
	at org.eclipse.angus.mail.imap.IdleManager$1.run(IdleManager.java:140)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:833)

Going through the code, there's nothing that invokes the listeners.

To Reproduce
Steps to reproduce the behavior:

1. Setup IMAP server that closes connections after some idle time
2. Open folder
3. Add ConnectionListener to the folder
4. IdleManager.watch folder

Expected behavior
The closed method of all ConnectionListeners added to the folder should be invoked.