patched histology blocks worklist to hide non-block/slide sample types; 1 new & 1 renamed field for genomics, returned additional_samples to SpecimensBlood for legacy ppm xml validation
bugfix to user messaging - misformed html ensured new messages lost if user already had undeleted messages in user_message table (misformed </form> tag); put character counter on histology blocks worklist 'reference' text box
put CSRF logic into histology blocks worklist to prevent form resubmission - had multiple duplicate 'returned blocks' entries in request_lab_test_history
histology block refs displayed in year groups; changed date ref to 16 char string for recorded delivery info; returned list of records updated instead of redirect to redisplay block ref worklist
