Templates as attachments

[stephenegriffin]

These are oft files attached as ATTACH_BY_VALUE with essentially an MSG file in PR_ATTACH_DATA_BIN stream. Should be able to hydrate this to an in memory IMessage and display.

View attachments as embedded message could pick this up automatic (CAttachmentsDlg::OpenItemProp) Double-click oft row also (CAttachmentsDlg::OnDisplayItem)

OpenEmbeddedMessage wouldn't work as is, but a variant of it should. Swipe from LoadFromMSG and LoadMSGToMessage