Diffusion GpgOL d27f609e7f60

Add explicit decrypt as WindowMessage handler

Authored by aheinecke on Nov 9 2018, 6:17 PM.

Description

Add explicit decrypt as WindowMessage handler

* src/mail.cpp (decryptVerify_o): Remove obsolete safeguard
against double decryption.
* src/windowmessages.cpp (EXT_API_DECRYPT): Add new command.

This is nice to have a close -> do something with the encrypted
mail -> decrypt again workflow.