ENH: Add option to automatically make new wp admins Sp admins

[elindydotcom]

Right now, when a new WP ADMIN is created or a user's role is upgraded to a wp Admin, they are not automatically added as an SP admin.

Need to add two options to the FOURM->ADMINS->GLOBAL ADMINS screen:

• Automatically make new WP ADMINS SP Admins
• Automatically downgrade SP Admins when WP Admins are downgraded

This will allow admins to automatically add and remove SP admins as WP admins are added and removed.