[Aggregator WA] Overrides are nice.
[Aggregator WA] Set WebAccess thread name.
[Aggregator WA] Better ModelItem API.

Added GetChildren(), GetRow() for const ModelItems and parameterless
GetRow().
[Aggregator WA] Implemented {to,from}RawIndex() for models.

Avoids clearing view selection on filter invalidation, for example.
[Aggregator WA] Added translations.