Prices are right again when you are offline: add-ons are charged, a just-synced product
never rings up at 0.00, and offline totals match the server to the cent.

• Add-ons are charged. An add-on that belongs to an add-on group could drop off the cart
  line — the product sheet said 6.00 while the cart and the receipt said 4.00.
• A product that has just synced no longer rings up at 0.00 while its tile shows the right
  price.
• Offline totals now match the server to the cent. A tax-included price rings the price you
  typed (12.00 × 7 is 84.00, not 83.96), an order discount on top of a product discount no
  longer overcharges, a tax marked "not calculated" is charged once instead of twice, and a
  variable-price item is taxed by its own taxes only.
• Cost and profit are recorded per line, so profit reports for orders rung on the app are
  no longer understated by the quantity.
• The tax row in the payment summary no longer stays hidden for the whole session after a
  cold start.
• Logging out and back in no longer lands on "Something Went Wrong".
• Customer display: the cart no longer blanks a second after each item is added, and the
  thank-you screen shows after checkout on tablets.
• The order-type icon on the cart matches the one configured under Order Types, on every
  screen.
• Local sync between devices recovers when its port is already in use instead of silently
  sending to no one.
• The riyal symbol in the Offers dialog draws correctly instead of a box.
• Settings: a tax-included add-on option opens at the price you entered, not its net.