protz/GMail-Conversation-View — pull request #645 by shirosaki (2012-09-14 15:04:37+00:00)
Title: Show warning and use PGP/MIME with attachments

If we send a message with attachments using inline-PGP and quick reply,
attachments are not be encrypted. In the case we show warning message
and we can switch to PGP/MIME.

Fix for #640.

Thank you.