RimWorld Release version

v1.021:

• Fix: prefab boxes had their labels duplicated after save / load
• Fix: price ranks for prefab box graphics were not correctly assigned
• Fix Prefab catalog building still had a "todo" description
• Fix: Prefab designator in Furniture had untranslateable strings
• Fix: description will now show the structure that will be built, without including "prefab box" too, as it is redundant