patched C::Screen::edit() to use same screening function as used at initial screen; fixed a lot of failing tests due to new screening functions - report_status.t still failing
changed Dispatch param from _whoami to Class; removed do_ajax from unprotected runmodes, added ajax class to unprotected classes; bugfix to LIMS::_check_portal_referral() - added user profile to list of requirements; increased test count on column_types.t
