perf(entities): preloads owners when drawing lists of entities/likes

When drawing lists of entities/likes with a variety of owners, many owners
end up being loaded one by one (inefficient). This adds a component that
walks the list and preloads all the owners into the cache in one shot.

Fixes #5949
Merge pull request #6975 from mrclay/5949_2

perf(entities): preloads owners when drawing lists of entities/likes