Allow for collapsing events that occur in a short span of time (user selectable)

[tjchambers]

Sometimes a create occurs with a subsequent update - or a very quick update occurs following another update due to a series of saves. It would be nice to be able to take these chronologically close events and collapse them into a single display if the time range is within a short user selectable horizon (like 2 seconds for example), and are for the same whodunnit and mash them under one heading of who did it.