Pincode dialog added that supports phone and store applications. Will detect when app is backgrounded and brought up, and prompt for pincode if the policy has changed... both to create if not created, or to verify if a pincode exists.

Pincodes are attached to each account logged in through the switcher, and switching to an account that requires a pincode will require immediate pincode regardless of pincode timer requirements. Switching to a user that has no pincode will not require a pincode entry.