- Adding missing error handler (try) for openpgp.message.readArmored in okBtnDecrypt.
- Changing the if/then statement in onMsgView to ignore forwarded messages.
  Not doing this for doDrop, so we have 2 ways of doing things.
Thanks to: Truong Anh Tuan for reporting this bug.
See also:  https://github.com/barrydegraaff/pgp-zimlet/issues/48