Fix the infinite & virtualized List is invisible that caused by its height...

Fix the infinite & virtualized List is invisible that caused by its height can't be calculated (#10046)

components/list/demo/infinite-virtualized-load.md

@@ -129,7 +129,7 @@ class VirtualizedExample extends React.Component {
       <List>
         {
           data.length > 0 && (
-            <WindowScroller scrollElement={null}>
+            <WindowScroller>
               {infiniteLoader}
             </WindowScroller>
           )