Make the drawer, popup menus, dialogs, and settings page scrollable.

sky/sdk/lib/rendering/flex.dart

Index: sky/sdk/lib/rendering/flex.dart
diff --git a/sky/sdk/lib/rendering/flex.dart b/sky/sdk/lib/rendering/flex.dart
index 43726d3c2d0d78420093f93be4c1537771324ebd..53fff1ca5fcb78da04bacf23dd93083420d73ee9 100644
--- a/sky/sdk/lib/rendering/flex.dart
+++ b/sky/sdk/lib/rendering/flex.dart
@@ -47,12 +47,11 @@ class RenderFlex extends RenderBox with ContainerRenderObjectMixin<RenderBox, Fl
     FlexDirection direction: FlexDirection.horizontal,
     FlexJustifyContent justifyContent: FlexJustifyContent.start,
     FlexAlignItems alignItems: FlexAlignItems.center
-    }) : _direction = direction,
-         _justifyContent = justifyContent,
-         _alignItems = alignItems {
-      addAll(children);
-    }
-
+  }) : _direction = direction,
+       _justifyContent = justifyContent,
+       _alignItems = alignItems {
+    addAll(children);
+  }
 
   FlexDirection _direction;
   FlexDirection get direction => _direction;