1988e1b849
Multiple ExtraKindDef entries share the same feedKey (e.g. posts/comments both use feedIncludePosts) and multiple subKinds share the same showKey (e.g. both video sub-kinds use showVideos). Using these as React keys caused 'duplicate key' warnings. Use def.id (always unique) for ContentTypeRow keys and sub.feedKey (unique per sub-kind) for SubKindRow keys.