Otherwise we'd only preload the ancestors that would fit the
page. That way, when a search result was on the first page, but the
ancestor didn't fit the page anymore. We would not have the preloaded
ancestor when rendering the hierarchy.
By preloading the count of members, projects and subgroups of a group,
we don't need to query them later.
We also preload the entire hierarchy for a search result and include
the counts so we don't need to query for them again
