(GH-105) package moderation comparer

Slowwwww
(GH-105) Remove the comparer
(GH-105) fix a small issue with lastupdated/reviewed
(GH-105) pass list of item to viewmodel

Instead of passing a LINQ query over, execute in the controller and then pass
that to the viewmodel to display. Also for perf, don't include the existing
unreviewed packages in the moderatorqueue unless we are on at least the page
where it is displayed.
(GH-105) LastUpdated == lastupdated when status is submitted

This resolves an annoying bug where packages that have been updated are showing
up incorrectly in the moderation queue.