added specimen filter to request status worklists; combined date and delta values with colour-coded display in incomplete tests & request status worklists
moved actions associated with unlock into lims_config.pl for central loading for app & templates, and coupled unlock function to associated actions in Resources / user permissions
bugfix to L::Model::User do_transaction, testing for db_error instead of transaction success; request_links.tt loads PhoneLog link if user_can(phone_log) instead of modify_results