-staff page: id type, update table staff on id_num != unique
-disburse client page: id type, add buying to activity select box
-client: update label
-update label on client page
-Product: hidden 'loan amount type=none', fix exchange select box.
-delete autocomplete on select2 (loan acc #, staff list)
-pull _getLoanAccount() to LookupValueList
fix backup on 'ln_staff' line 40