adding the new URL parameter application_url to the /permissions/one page, and its neighboring pages, so that you can get back to an application after having managed the permissions of an application object. Previous commit by me to the /permissions/one page didn't fully get the job done.
adding new parameter to permissions page - return_url. If it is present then instead of offering a link up to the Main Site we offer a link to return to the application the user came from