Fix for storing sent emails into imap folder

[dsp]

I recently discovered the hidden "store sent emails into imap folder" functionality, however, it was broken. Here's my quick fix that seems to work nicely:

/application/Espo/Services/EmailAccount.php - line 154:
-- $storage->appendMessage($message, $folder);
++ $storage->appendMessage($message->toString(), $folder);

[yuri]

It didn't work when we tested. Seems Zend fixed it. Thanks.

[SpeedBullet]

Will this be implemented in the next update? I'd like to auto import sent messages as well if possible.

[yuri]

Yes we will.