For Kolab or community version based on Roundcube 1.2 we need:
- One two-state icon for Mailvelope integration: https://kolabian.wordpress.com/2015/10/10/mailvelope-integration-pgp-encryption/
- Around 4 icons for Enigma plugin https://kolabian.wordpress.com/2015/10/13/enigma-plugin-pgp-encryption/