Fix download attachments of encrypted message on child window
Fix download attachments of encrypted message on child window

nguyennv/openpgp-zimlet,nguyennv/openpgp-zimlet,iwayvietnam/openpgp-secure-zimlet,nguyennv/openpgp-zimlet,iwayvietnam/openpgp-secure-zimlet,nguyennv/openpgp-secure-zimlet,nguyennv/openpgp-secure-zimlet,nguyennv/openpgp-secure-zimlet,iwayvietnam/openpgp-secure-zimlet