fix(thread-info-expunge-moveTo): Added thread information to EXPUNGE message called after MoveTo action (#788)

Author: jissepo

lib/message-handler.js

@@ -1185,6 +1185,7 @@ class MessageHandler {
                                                                 ignore: options.session && options.session.id,
                                                                 uid: messageUid,
                                                                 message: messageId,
+                                                                thread: message.thread,
                                                                 unseen,
                                                                 // modseq is needed to avoid updating mailbox entry
                                                                 modseq: newModseq