Added topic statuses to settings area. Added as status groups, which allows more control.
Added topic status group selection to boards via admin interface and functions.
Now just need to implement selection of status on topics via both admin and clientarea.
From front end point of view topic status selection will be during creation. and when the topic author replies they will be allowed to change status. And of course moderators can change status at any time via admin, and replies on front end.