Make "Jump to unread" work

Without this and 4.0/updatestatus-displaypath, Jump to unread will link
to /Ticket/Display.html?id=7#txn-id=foo but during the redirect to
/RTIR/Display.html the anchor is lost and the page never moves.  You can
click the link all you want.

Mark as read and jump works because it passes the Anchor in an argument
which is respected in MaybeRedirectForResults.