[MlMt] Sign & Encrypt option no longer available after moving Mailmate

[Andreas Jung]

Hi there,

I moved my Mailmate installation to a new Mac. I copied all .plist files 
and everything
is almost working except that I do no longer see options for signing 
and/or encrypting
an email on the left of the dropdown of available email identities 
within the composer windows.
However I can read and decrypt encrypted GPG emails. The gpg2 binary is 
also available
(Installed via Homebrew).

-aj