[ASCollectionNode] Fix missing properties and layoutInspector #trivial (

TextureGroup#305)

* [ASCollectionNode] Set the layoutInspector from the pendingState in didLoad.

* [ASCollectionNode] Forward scroll properties from the view.

Source/ASCollectionNode.mm

@@ -181,6 +181,7 @@ - (void)didLoad
     view.inverted                = pendingState.inverted;
     view.allowsSelection         = pendingState.allowsSelection;
     view.allowsMultipleSelection = pendingState.allowsMultipleSelection;
+    view.layoutInspector         = pendingState.layoutInspector;
 
     if (pendingState.rangeMode != ASLayoutRangeModeUnspecified) {
       [view.rangeController updateCurrentRangeWithMode:pendingState.rangeMode];
@@ -427,6 +428,16 @@ - (UICollectionViewLayout *)collectionViewLayout
   }
 }
 
+- (ASScrollDirection)scrollDirection
+{
+  return [self isNodeLoaded] ? self.view.scrollDirection : ASScrollDirectionNone;
+}
+
+- (ASScrollDirection)scrollableDirections
+{
+  return [self isNodeLoaded] ? self.view.scrollableDirections : ASScrollDirectionNone;
+}
+
 - (ASElementMap *)visibleElements
 {
   ASDisplayNodeAssertMainThread();