validation for user messages

moved user messages user list from 1-stage to 2-stage select menu; reverted sysmex.pl to barcode lab-numbers; bugfix: report page highlighting 'unknown patient details' expecting hash key 'previous_cases', was changed to 'previous_requests' long ago

replaced iterator on users table with get_objects - iterator throws error if 1000 rows; put sort order on get_request_storage() query

bugfixes: user_messages template had duplicate new_msg id's; gallium_pending generating duplicate records if request_history duplicated (eg authorised)

bugfixes

added outbound messages to user message centre; grouped users into optgroups in new message function

moved authen_config from lims_config.pl to main LIMS app - CUSTOM callback doesn't work when cfg loaded using Class::Singleton instance; modified idle timeout function to automatically load logged-in username in login screen, so only passwd required, and added link to logout if different user; cgiapp_prerun checks form param username matches authen; added region_code back to user_locations + admin functions

added new region_code col to user_locations table; updated admin user_location function + validation to reflect

added a user messaging system; user change registered email resource