11941: Invoice for products that use qty decimal rounds down to whole number.

[nmalevanec]

Description

Fix for: Invoice for products that use qty decimal rounds down to whole number.

Fixed Issues (if relevant)

1. Invoice for products that use qty decimal rounds down to whole number #11941: Invoice for products that use qty decimal rounds down to whole number

Manual testing scenarios

1. Create a virtual product.
2. In Advanced Inventory Qty Uses Decimals = Yes.
3. In the admin create an order using the new product and pay with check/money order.
4. Purchase a quantity of 6.5 of the product and complete the order.
5. Start to create the invoice, check at the QTY invoiced it should not be rounded down to 6.
6. Change "Qty to Invoice" to any decimal qty less than 6.5. Press "Update Qty's", check "Qty in Invoice" should not be rounded.

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)