Fix detailed sales report for sale_type = sale
Invoice number can now be enabled/disabled
Invoice unique constraint only applies when enabling invoice
Correct several HTML structure errors in sale and order modules
Make the top module bar a bit wider
Fix payment details css when hiding/showing invoice number field
Revert newly added receivings functionality
Add receivings invoice number enable/disable
Ignore invoice number unique constraint when invoice is disabled
Dashes are allowed now in barcode text
Update barcode with newer drop in version (thanks Odie)
Remove invoice / sale format enable option
Add giftcards -> person_id foreign key constraint
Fix tax calculation for non taxable customers
Improve giftcard person autocompletion
Add giftcard number autogeneration
Remove clear enable functions
Fix tax inclusive pricing for non taxable customer
Show receiving quantity in receiving receipt
Allow to use invoice number as zero (a bug prevented 0 to be saved to
db, causing it to stop incrementing next time)
Newly created item in sales module is auto added to sale again
Ignore receiving_quantity = 0 for receivings