fix(modules,contrib,thunderbird): correctly use hex and A1 key

[jonasbadstuebner]

I found out that the format for the unread message is actually HEX. And the key is A1, according to this header of an inbox file of mine.

< <(a=c)> // (f=iso-8859-1)
  (B8=highestRecordedUID)(B9=ns:msg:db:row:scope:pending:all)
  (BA=ns:msg:db:table:kind:pending)(BB=dateReceived)(BC=ProtoThreadFlags)
  (BD=sender_name)(BE=keywords)(BF=imageSize)(C0=junkscore)
  (C1=folderName)(C2=replyTo)(C3=junkscoreorigin)
  (C4=dobayes.mailnews@mozilla.org#junk.empty)
  (C5=dobayes.mailnews@mozilla.org#junk)(C6=preview)(C7=storeToken)
  (C8=gloda-id)(C9=gloda-dirty)(CA=notAPhishMessage)
  (CB=ns:msg:db:row:scope:ops:all)(CC=ns:msg:db:table:kind:ops)
  (80=ns:msg:db:row:scope:msgs:all)(81=subject)(82=sender)(83=message-id)
  (84=references)(85=recipients)(86=date)(87=size)(88=flags)(89=priority)
  (8A=label)(8B=numLines)(8C=ccList)(8D=bccList)(8E=msgThreadId)
  (8F=threadId)(90=threadFlags)(91=threadNewestMsgDate)(92=children)
  (93=unreadChildren)(94=threadSubject)(95=msgCharSet)
  (96=ns:msg:db:table:kind:msgs)(97=ns:msg:db:table:kind:thread)
  (98=ns:msg:db:table:kind:allthreads)
  (99=ns:msg:db:row:scope:threads:all)(9A=threadParent)(9B=threadRoot)
  (9C=msgOffset)(9D=offlineMsgSize)
  (9E=ns:msg:db:row:scope:dbfolderinfo:all)
  (9F=ns:msg:db:table:kind:dbfolderinfo)(A0=numMsgs)(A1=numNewMsgs)
  (A2=folderSize)(A3=expungedBytes)(A4=folderDate)(A5=highWaterKey)
  (A6=mailboxName)(A7=UIDValidity)(A8=totPendingMsgs)
  (A9=unreadPendingMsgs)(AA=expiredMark)(AB=version)(AC=forceReparse)
  (AD=fixedBadRefThreading)(AE=onlineName)(AF=useServerRetention)
  (B0=MRUTime)(B1=sortType)(B2=sortOrder)(B3=viewFlags)(B4=viewType)
  (B5=sortColumns)(B6=highestModSeq)(B7=imapFlags)>

It shows the correct number now for me.

[jonasbadstuebner]

"Proof":

[tobi-wan-kenobi]

Thanks a lot for the PR!