Update Button to be made of Material

sky/examples/widgets-fn/main.sky

Index: sky/examples/widgets-fn/main.sky
diff --git a/sky/examples/scrolling/index.sky b/sky/examples/widgets-fn/main.sky
similarity index 60%
copy from sky/examples/scrolling/index.sky
copy to sky/examples/widgets-fn/main.sky
index 12a129ec0f76739c4e47f280756c77a520a61441..c7c304f909ccda7358239dead1ebf84bf5f003ed 100644
--- a/sky/examples/scrolling/index.sky
+++ b/sky/examples/widgets-fn/main.sky
@@ -5,6 +5,11 @@
 // found in the LICENSE file.
 -->
 <sky>
-  <import src="scrolling.sky" />
-  <scrolling />
+<import src="/sky/framework/debug/shake-to-reload.sky" />
+<script>
+import 'widgets_app.dart';
+main() {
+  new WidgetsApp();
+}
+</script>
 </sky>