MAGETWO-83155: [2.1-develop] Order grid - Sort by Purchase Date Desc by default #11932

 - Merge Pull Request #11932 from ihor-sviziev/magento2:2.1-develop-order-grid-sort-by-purchase-date
 - Merged commits:
   1. 22e05d1

Author: Oleksii Korshenko

app/code/Magento/Sales/view/adminhtml/ui_component/sales_order_grid.xml

@@ -166,7 +166,6 @@
             <argument name="data" xsi:type="array">
                 <item name="config" xsi:type="array">
                     <item name="filter" xsi:type="string">text</item>
-                    <item name="sorting" xsi:type="string">desc</item>
                     <item name="label" xsi:type="string" translate="true">ID</item>
                 </item>
             </argument>
@@ -187,6 +186,7 @@
                     <item name="component" xsi:type="string">Magento_Ui/js/grid/columns/date</item>
                     <item name="dataType" xsi:type="string">date</item>
                     <item name="label" xsi:type="string" translate="true">Purchase Date</item>
+                    <item name="sorting" xsi:type="string">desc</item>
                     <item name="dateFormat" xsi:type="string">MMM dd, YYYY, H:mm:ss A</item>
                 </item>
             </argument>