MAGETWO-34984: Invert new admin styles scope

Author: Evgeniy Kolesov

app/code/Magento/Catalog/view/adminhtml/layout/catalog_product_new.xml

@@ -24,6 +24,10 @@
         </referenceContainer>
         <referenceContainer name="left">
             <block class="Magento\Catalog\Block\Adminhtml\Product\Edit\Tabs" name="product_tabs">
+                <!-- @todo ui: remove arguments within .admin__scope-old -->
+                <arguments>
+                    <argument name="panels_class" xsi:type="string">admin__scope-old</argument>
+                </arguments>
                 <block class="Magento\Backend\Block\Widget\Tab" name="product_tabs.customer_options" as="customer_options">
                     <arguments>
                         <argument name="label" xsi:type="string" translate="true">Custom Options</argument>

app/code/Magento/Downloadable/view/adminhtml/layout/catalog_product_downloadable.xml

@@ -10,7 +10,6 @@
         <referenceBlock name="product_tabs">
             <!-- @todo ui: remove arguments within .admin__scope-old -->
             <arguments>
-                <argument name="panels_class" xsi:type="string">admin__scope-old</argument>
                 <argument name="excluded_panel" xsi:type="string">product_info_tabs_downloadable_items_content</argument>
             </arguments>
             <action method="addTab">