Tabbing doesn't quite work right

[tjayrush]

1. The last tab position on a view is not preserved in session
2. The header toggle is at the Settings level not the tab level so if one closes a header in Status, it closes in Config as well
3. nItems is assigned at the ViewContext level (as is Pager). This means that if Status has nItems=100 and Config has nItems = 12, the Config table will paginate to record 100 (it should only go to 12) -- upshot nItems needs to be per tab.