[MlMt] Signed sent messages not uploaded

[Jan Münnich]

Hi Benny,

I noticed today that some of my sent messages from the last days were 
not synchronised to the other clients. After some researching I found 
out that this affects all signed messages (S/MIME and GPG) since the 
update to 1.13.2.

Is there any quick fix or do I have to downgrade to 1.13.1 again? This I 
would like to avoid because of the critical S/MIME fixes in 1.13.2.

Thanks,
Jan