I don't think you need to do anything about this now, since it might be better to open a new issue and think about it, but I just realised that works have a ```title_to_sort_on``` property for, uh, sorting. The subscribable only grabs the ```title``` - and for display purposes, that's correct.

Leaving this note here so we don't forget about it - maybe a new method on subscribable, ```name_to_sort_on```, which would grab the "sort_on" property if it exists, or default to the normal name if the object doesn't respond_to a sort on property?