Required a lot of changes to provide at least a decent attempt at proper
editor teardown control.
Also updates HtmlDescriptionFilter and testing to address issue with bad
child iteration which could lead to missed items.
Renamed editor version from comments to basic as it'll also be used for
item descriptions.
To provide more control of the summary as part of details.
To support, added a way to ignore elements during import DOM, allowing
up to read summaries when parsing details without duplicate nodes
involved.
