by mearnest: convert United Kingdom country code and Midlothian province to Location compatible codes (uk instead of GB and MLN instead of MLOT).

by mearnest: query added to get country_id value which is now passed to javascript for comparing country values. apply_address() js function replaced by uc_location_apply_address() for faster zone lookup when changing country select field.

 by mearnest: call time pass-by-reference removed for _uc_location_primary_not_set() . Pass-by-ref specified  in function def.

by mearnest: user_load() now called if the user's locations doesn't exist to ensure that the user account is fully loaded.