Truncated history view


After a short time, the history view appears to saturate and only updates the entry at the top of the list. The rest of the list is frozen in time.
It is not clear if the serialized history is truncated or the view of the history is being truncated. The history form itself is unlikely to be the cause as it is very thin.
I added a wipe history option that temporarily gets around this, and is also useful for other purposes, but the record serialization code is a bit tricky to follow. My suspicion is that the record chunking is failing to keep the chunk headers completely up-to-date, but I am not too keen to take it all apart. This could be a task for the architect :-)

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