Implement new behaviour, how to  mark contente for listings.


* No longer auto apply the IOrgUnitMarker interface. 
* Renamed the interface to IListingMarker (not really sure if this is better :confused: ).
* Add checkbox, which handles the marker interface.
* Protect new checkbox with his own permission.
* Currently this only directly affects the authorities_view
* Collections needs to be changed manually (No upgrade step).