MAGETWO-86430: [Backport to 2.2-develop] Attribute with 'Catalog Input Type for Store Owner' equal 'Fixed Product Tax' for Multi-store #13019

 - Merge Pull Request #13019 from dverkade/magento2:2.2-Attribute-with-Catalog-Input-Type-for-Store-Owner
 - Merged commits:
   1. 13546a7

Author: miguelbalparda

app/code/Magento/Weee/Ui/DataProvider/Product/Form/Modifier/Manager/Website.php

@@ -68,7 +68,7 @@ public function getWebsites(ProductInterface $product, EavAttribute $eavAttribut
         if ($storeId = $this->locator->getStore()->getId()) {
             /** @var WebsiteInterface $website */
             $website = $this->storeManager->getStore($storeId)->getWebsite();
-            $websites[$website->getId()] = [
+            $websites[] = [
                 'value' => $website->getId(),
                 'label' => $this->formatLabel(
                     $website->getName(),
@@ -81,7 +81,7 @@ public function getWebsites(ProductInterface $product, EavAttribute $eavAttribut
                 if (!in_array($website->getId(), $product->getWebsiteIds())) {
                     continue;
                 }
-                $websites[$website->getId()] = [
+                $websites[] = [
                     'value' => $website->getId(),
                     'label' => $this->formatLabel(
                         $website->getName(),