The belongs_to_creator macro was used to initialize the creator_id field
to the CurrentUser. This made tests complicated because it meant you had
to create and set the current user every time you wanted to create an
object, when lead to the current user being set over and over again. It
also meant you had to constantly be aware of what the CurrentUser was in
many different contexts, which was often confusing. Setting creators
explicitly simplifies everything greatly.
Normally we skip doing page counts on index pages when there aren't any
search filters. This is on the assumption that most index pages have
more than 1000 pages (20,000 results), so it's not worth counting them
exactly. This isn't always true, so here we turn on full counts on
certain index pages known to be small.
