MAGETWO-95866 Fix tests

Author: ptylek

app/design/adminhtml/Magento/backend/Magento_Backend/web/css/source/module/_menu.less

@@ -268,10 +268,10 @@
             }
 
             > ul[role='menu'] {
-                overflow-x: auto;
-                overflow-y: hidden;
                 max-width: ~'calc(100vw - @{menu__width})';
                 min-height: @submenu__height;
+                overflow-x: auto;
+                overflow-y: hidden;
             }
         }