commerce 8.x-2.0-rc3

The next release will be 2.0, released on September 20th.
Join us for release parties all over the world: https://commerceguys.com/celebrate-drupal-commerce-2

Major changes since RC2:

• Major improvements to our documentation (new outline, split into User and Developer guides)
• Now fully compatible with Drupal 8.4.x
• Coupons have been moved to their own tab next to the Promotion edit form. This will help us implement bulk coupon generation in a future release.
• Improved the UX of the currency listing page ("Import currency" -> "Add currency", "Add currency" -> "Add custom currency")
• On-site gateways can now implement webhooks (via the new SupportsNotificationsInterface)
• Orders can now be locked, which protects then against edits and hides their carts. Used at checkout when the customer is sent off-site to pay.
• Added an optional "Empty cart" button for the cart form

Changes since 8.x-2.0-rc2:

• #2909336 by bojanz: No events are fired for coupon CRUD
• #2909171 by agoradesign: In Austrian stores both the Austrian and the German VAT is added
• #2906563 by edwardaa, bojanz, MegaChriz: Provide a way to explicitly lock the order
• #2902408 by chrisrockwell, bojanz: Applying a coupon saves the other checkout panes
• #2908571 by bojanz: ProfileSelect should validate that the default country is allowed
• #2908568 by bojanz: Remove the "Site default" default country from the profile address field
• #2870672 followup: Fix the mismatched field definition error by adding an update hook.
• #2898258 followup: Improve the update hook by copying the one from core.
• #2904570 by edwardaa, bojanz: $this->entityId always NULL in plugins in Drupal 8.4.x
• #2908285 by Wim Leers, bojanz: Payment link template of 'operation-form' does not work in Drupal 8.4
• #2902880 by bojanz: Move coupons to a new tab
• #2904542 by czigor: CommerceKernelTestBase creates a store based on a missing store type
• #2900917 by swickham, bojanz: Add an optional "Empty cart" button
• #2907828 by Sweetchuck: ProductForm class in #attributes should be an array
• #2898258 by bojanz, Berdir: Sync the ProductForm UX with the 8.4.x NodeForm
• #2906457 by jackbravo: Pass the payment to HasPaymentInstructionsInterface::buildPaymentInstructions (#783)
• #2905147 by mglaman: Use order item label for purchased entity label
• #2905147 by duozersk: Commerce Log: Call to a member function label() on null
• #2888231 by mglaman: Attribute widget should respect if order item has a pre-selected purchased entity
• #2870672 by bojanz, vasike, Berdir: Product should implement EntityPublishedInterface
• #2893967 by cbildstein, acromel, bojanz, AaronChristian, rszrama: Improve the UX of importing / creating currencies
• #2906360 by jackbravo, bojanz: Move OffsitePaymentGatewayInterface::onNotify to its own interface
• #2856209 by vasike, bojanz: PaymentStorage should provide a method to load a payment by its remote id
• #2900938 by FatherShawn: PaymentAccessControlHandler fails if the Order does not exist
• #2874055 by jsacksick: Create a functional test for the Custom tax type plugin
• #2842256 by steveoliver, finne: Provide a getter method for adjusted price of order items
• #2906624 by joachim, bojanz: declare the Commerce Condition plugin type
• #2906027 by czigor: Add Payments to the order listing dropbutton
• #2906863 by bojanz: Fix permissions of commerce_checkout.module and commerce_payment.module
• #2900981 by czigor, tranthanhthuy, bojanz: The price is multiplied by 1000.000 when translating a variation
• #2906026 by kevinhowbrook: Rename PaymentStorage::loadMultipleForOrder to loadMultipleByOrder
• #2906209 by bojanz: Add ProductVariationStorage::loadBySku($sku)
• #2896815 part 2: The configured order summary view is never used.