added new imaging functions to HMRN - will replace staging to allow followups fro CT & PET scans

bugfixes - worklist data entry template missed results_entry flag for table headers; pre-screen worklist displays userID

HMRN new diagnoses list displays number of previous requests for patient; multiple record search displays request and diagnosis status, with diagnosis as mouse-over if authorised

HMRN data collection templates; extended HMRN potential new malignancies function to include known previous diagnoses list; renamed M::HMRN::Data::all_diagnoses() to all_icdo3_diagnoses() & modified for use with M::HMRN::get_previous_diagnoses()

moved M::HMRN::get_all_hmrn_data() procedures to M::HMRN::Data Role