Invoices 1.2.0

1.2.0.0:
- Fixed pallet pricing: output pallets (milk, cheese, etc.) now use the current market price instead of the store purchase price
- Added invoice proposals: propose an invoice you will pay, to be approved by the issuing farm
- Added custom label on invoice lines (rename via dialog)
- Added multi-instance support for the same work type (independent price and quantity per line)
- Added chopped straw (chaff) to the Products selection list
- Added sorting on received and sent invoice columns
- Kept invoice draft when closing the creation menu
- Fixed Invoices tab display in the menu
- Fixed certain products being invoiced per piece instead of per liter
- Added full translation coverage for all 27 supported languages