* WIP: Grid export and plugin extraction
* Tweak export process
* Check for recursion of the same assembly load.
* Individual screens aren't always primary?
* Wait for cache to be writable
* Export selection only.
* Update built xml docs
* Ignore invalid archives.
* Need to ensure task is started.
Upon arrival of new records to the backing ObservableCollection, scroll the DataGrid to the last item. However, when the DataGrid is initialized, there's not yet a data context set, so when that happens, then we can listen to the CollectionChanged event to trigger scrolling (only really needed for additions).
In passing, also set the DataGrid to ReadOnly.
In the other two files, minor simplifications/cleanup.
