HOF: make categories link to the subcategory
HOF: make categories link to the subcategory

Currently, if you want to see the "HoF -> Planets" page, you have
to click on the "Buildings" button in the "Planets" subcategory,
and then click "Planets" in the breadcrumb you get on that page.

This Category link allows you to go directly to the subcategory
page.

hemberger/smr,hemberger/smr,smrealms/smr,hemberger/smr,smrealms/smr,smrealms/smr,hemberger/smr