Site fixes

Fixes dart-lang/www.dartlang.org#1112
I removed the `storage == null` check because when testing locally `items` was never initialized because `storage` was always `null` when reaching this block. Not sure exactly where the failure was happening (I'm in vacations this week) but basically `itemsChanged` or `newItem` was being called with `items` still null. The change above seemed to fix things :)