MAGETWO-69370: Add ability to use tree-massactions ("sub-menus") on Sales > Orders grid #4450

 - Updated configuration to use the correct format

Author: ishakhsuvarov

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

@@ -56,12 +56,7 @@
                 </settings>
             </filterSelect>
         </filters>
-        <massaction name="listing_massaction">
-            <argument name="data" xsi:type="array">
-                <item name="config" xsi:type="array">
-                    <item name="component" xsi:type="string">Magento_Ui/js/grid/tree-massactions</item>
-                </item>
-            </argument>
+        <massaction name="listing_massaction" component="Magento_Ui/js/grid/tree-massactions">
             <action name="cancel">
                 <settings>
                     <url path="sales/order/massCancel"/>