FIX: Don't publish PM archive events to acting user. (PR #14291)

When a user archives a personal message, they are redirected back to the inbox and will refresh the list of the topics for the given filter. Publishing an event to the user results in an incorrect incoming message because the list of topics has already been refreshed.

This does mean that if a user has two tabs opened, the non-active tab will not receive the incoming message but at this point we do not think the technical trade-offs are worth it to support this feature. We basically have to somehow exclude a client from an incoming message which is not easy to do.

Follow-up to fc1fd1b41689694b3916dc4e10605eb9b8bb89b7


Thank you for the review @eviltrout :hugs: