Merge forwardport of #11952 to 2.3-develop branch

Applied pull request patch https://github.com/magento/magento2/pull/11952.patch (created by @RomaKis) based on commit(s):
  1. eeb7dff

Fixed GitHub Issues in 2.3-develop branch:
  - #11832: Create order (on Customer edit page) - not working from admin environment (reported by @psbhanu)

Author: magento-engcom-team

app/code/Magento/Sales/Block/Adminhtml/Order/Create/AbstractCreate.php

@@ -160,4 +160,22 @@ public function convertPrice($value, $format = true)
             )
             : $this->priceCurrency->convert($value, $this->getStore());
     }
+
+    /**
+     * If item is quote or wishlist we need to get product from it.
+     *
+     * @param $item
+     *
+     * @return Product
+     */
+    public function getProduct($item)
+    {
+        if ($item instanceof Product) {
+            $product = $item;
+        } else {
+            $product = $item->getProduct();
+        }
+
+        return $product;
+    }
 }

app/code/Magento/Sales/Test/Unit/Block/Adminhtml/Order/Create/AbstractCreateTest.php

@@ -3,8 +3,10 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+
 namespace Magento\Sales\Test\Unit\Block\Adminhtml\Order\Create;
 
+use Magento\Catalog\Model\Product;
 use Magento\Catalog\Pricing\Price\FinalPrice;
 
 class AbstractCreateTest extends \PHPUnit\Framework\TestCase
@@ -67,4 +69,34 @@ public function testGetItemPrice()
             ->willReturn($resultPrice);
         $this->assertEquals($resultPrice, $this->model->getItemPrice($this->productMock));
     }
+
+    /**
+     * @param $item
+     *
+     * @dataProvider getProductDataProvider
+     */
+    public function testGetProduct($item)
+    {
+        $product = $this->model->getProduct($item);
+
+        self::assertInstanceOf(Product::class, $product);
+    }
+
+    /**
+     * DataProvider for testGetProduct.
+     *
+     * @return array
+     */
+    public function getProductDataProvider()
+    {
+        $productMock = $this->createMock(Product::class);
+
+        $itemMock = $this->createMock(\Magento\Wishlist\Model\Item::class);
+        $itemMock->expects($this->once())->method('getProduct')->willReturn($productMock);
+
+        return [
+            [$productMock],
+            [$itemMock],
+        ];
+    }
 }

app/code/Magento/Sales/view/adminhtml/templates/order/create/sidebar/items.phtml

@@ -67,11 +67,7 @@
 
                         <?php if ($block->canDisplayPrice()): ?>
                             <td class="col-price">
-                                <?php if ($block->getDataId() == 'cart'): ?>
-                                    <?= /* @noEscape */ $block->getItemPrice($_item->getProduct()) ?>
-                                <?php else: ?>
-                                    <?= /* @noEscape */ $block->getItemPrice($_item) ?>
-                                <?php endif; ?>
+                                <?= /* @noEscape */ $block->getItemPrice($block->getProduct($_item)) ?>
                             </td>
                         <?php endif; ?>