fixed the problem where notifications are not keeping track of the target id as well as making notifications for a mention be destroyed when a post is

This reverts commit 181bd823, reversing
changes made to 2c3ed2ab.

Revert "persists open aspects across logins also fixed the status message controller spec broken in master"

This reverts commit 9e7f0323.

translation of invitation message, better checking of existing users and unique index on user(invitation_service and invitation_identifier)