Base class for the inventory sub-lister for items being worn. We use a special listing method to show these items, so that items being shown explicitly in a worn list can be shown differently from the way they would in a normal inventory list. (For example, a worn item in a normal inventory list might show a "(worn)" indication, whereas it would not want to show a similar indication in a list of objects explicitly being worn.)

This type of lister should normally only be used from within an inventory lister. This type of lister assumes that it's part of a larger listing controlled externally; for example, we don't show out-of-line contents, since we assume the caller will be doing this.

class WearingSublister :   WearingLister