Fix encoding of saved messages
Fix encoding of saved messages

Apparently horde libs use a different encoding when a message
is serialized to a string depending on whether a stream is
used or not.
Before, drafts and sent messages were stored with a wrong encoding,
although the message sent was correctly encoded.

Signed-off-by: Christoph Wurst <7abde52c298496fa169fb750f91f213a282142af@winzerhof-wurst.at>

kingjan1999/mail,ChristophWurst/mail,ChristophWurst/mail,kingjan1999/mail,ChristophWurst/mail,kingjan1999/mail