Merge branch 'fix-for-issue-38455' of https://github.com/YuriyYavorskiy/magento2 into fix-for-issue-38455

Author: engcom-Dash

app/code/Magento/Email/Model/Transport.php

@@ -242,11 +242,15 @@ public function sendMessage(): void
     private function setReturnPath(SymfonyMessage $email): void
     {
         if ($this->isSetReturnPath === 2 && $this->returnPathValue) {
-            $email->getHeaders()->addMailboxListHeader('Sender', [$this->returnPathValue]);
+            $email->getHeaders()->addMailboxHeader('Sender', $this->returnPathValue);
         } elseif ($this->isSetReturnPath === 1 &&
-            !empty($fromAddresses = $email->getHeaders()->get('From')?->getAddresses())) {
+            !empty(
+                /** @var \Symfony\Component\Mime\Address[] $fromAddresses */
+                $fromAddresses = $email->getHeaders()->get('From')?->getAddresses()
+            )
+        ) {
             reset($fromAddresses);
-            $email->getHeaders()->addMailboxListHeader('Sender', [current($fromAddresses)->getAddress()]);
+            $email->getHeaders()->addMailboxHeader('Sender', current($fromAddresses));
         }
     }
 

app/code/Magento/SalesGraphQl/Model/Formatter/Order.php

@@ -57,7 +57,7 @@ public function format(OrderInterface $orderModel): array
             'shipping_address' => $this->orderAddress->getOrderShippingAddress($orderModel),
             'billing_address' => $this->orderAddress->getOrderBillingAddress($orderModel),
             'payment_methods' => $this->orderPayments->getOrderPaymentMethod($orderModel),
-            'applied_coupons' => $orderModel->getCouponCode() ? ['code' => $orderModel->getCouponCode()] : [],
+            'applied_coupons' => $orderModel->getCouponCode() ? [['code' => $orderModel->getCouponCode()]] : [],
             'model' => $orderModel,
             'comments' => $this->getOrderComments($orderModel)
         ];

app/design/adminhtml/Magento/backend/Magento_Backend/web/css/source/module/main/_actions-bar.less

@@ -24,7 +24,7 @@
     padding: @page-main-actions__padding;
 }
 
-.actions-scrollable {
+.customer-index-edit .actions-scrollable {
     .page-actions {
         display: flex;
         overflow-x: auto;