Added a utility function to detect when a root-blog admin is viewing the administrative side of the root blog.
Added a utility function to detect when a root-blog admin is viewing the administrative side of the root blog.

cilcoberlin/wp-class-blogs,cilcoberlin/wp-class-blogs,cilcoberlin/wp-class-blogs,oberlin/wp-class-blogs,cilcoberlin/wp-class-blogs,oberlin/wp-class-blogs,oberlin/wp-class-blogs,oberlin/wp-class-blogs