Don't show unknown attachments in an extra view source window but in the main reader win which is opened anyhow.
Don't show unknown attachments in an extra view source window but in the
main reader win which is opened anyhow.

svn path=/trunk/kdepim/; revision=376827

lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi