Custom status messages should be sorted by name
E.g. one adds a custom status message for away with name "Be right back" and then another one with name "Away for good". Then if one goes to change his status and expand the Away group, he will see:
Be right back
Away for good
Last added messages is just appended on the bottom. Should be sorted by name, because it could be harder to find needed message if one has 20 or more status messages.
Reopening, as custom statuses should be ordered in Editing statuses window too.