Stalwart ids are only unique per account. When its opener named no
account, the viewer used the account of the folder open in the list,
and it resolved Trash, Junk and move targets from that folder as well.
Deleting a team message from the Unified Inbox therefore sent
`Email/set` to the user's own account and trashed an unrelated message
with the same id, and a message opened from a notification, deep link
or contact while a shared folder was open went to the shared account.
- the list names the open folder's account when it opens the viewer,
and the viewer takes the account from its opener only, fixed at open
- Trash, Junk, Inbox and move targets come from the message's account,
and delete and move take the message out of its own folder
- the store's delete and move take the viewed message: they only touch
the list's row when the list shows that account, and refuse folders
of any other account
- another account's message is marked read on the server directly
instead of through the open folder's list
- quick reply, unsubscribe and read receipts file into the message's
account's folders
- undo no longer slots another account's message into the open list
- Archive is only offered for mail of the open folder's account, since
it still resolves the archive folder from there
Linus Rath
5c7301b3f1