Things Done:
(1) Supplier list, Customer list, Product List on Purchase and Sale doesn't need pagination.
(2) Now purchase pi_id can be filled. And if keep blank, then sytem would generate it.
(3) Adding 'required => true' to mostly forms.
(4) Product purchase has it's own Barcode. [productBarcode][SS][ddmmYYYY].
(5) Fixing several bugs.
(6) Adding precision to Sale Individual report.
(7) Change 'destroy' word to 'delete'. Sounds more polite, or is it just my personal opinion?