Keep account picker updated with data source
Harden accounts subviews visibility toggling

Keep hidden flag properly updated.
Harden when sample app's person view controller updates

Instead of logging warnings, manually wrap the calls.
Fix client sending zombie access tokens in requests
Fix zombie pagination info in sample app data source
Fix not-ready label sometimes not showing in sample app
Fix person cell de/selection in sample app

The delayed presentation of person view controller
relative to when its view gets loaded causes it to
lose its role as its navigation controller
delegate.
Fix zombie rendered UI after sign-out in sample app

The cells would blank on re-render.