Dynamic list objects, eg History

Objects that can be placed in lists that expand, as a list, and have dynamic contents.

For example, a history list could be placed inside the lists view and, when expanded, show the previous n entries viewed in the detailed view. This list would not store duplicate entries, so if I viewed the entry for 死ぬ, followed it to 死 and then went back to 死ぬ, then the history list would contain 死ぬ; 死.

Perhaps sets could also be put into the lists view, so that when you clicked on it it would take you to the search. Any other use for dynamic lists that I can see can be done with sets because the only other ways to filter through entries dynamically that I can think of can be done with searches.