When looking at a History Summary entry, I should be able to see the actual change

(User Story, Investigate , Priority: Medium, Test Status: No automated tests yet , Reported By Justin du Coeur, )
History
Summary: That is, I should be able to click on one of the Properties that was changed, and see what it was changed to.
Might add a later story, to actually see a contextual diff of the changes in the case of text.