Invalid form label on Components Settings screen

[DJPaul]

In wp-admin Settings > BuddyPress, there is no form <label> printed for the check boxes on the Components screen because of a sprintf vs printf typo.

Beyond fixing this, we can go one step better and make the component name be the label element for the corresponding check box. This will bring enhancements to all users, because you'll be able to click/touch the component name to toggle the check box -- something I've personally been doing for years and getting frustrated that it never worked.