Set fade property before adding view (#328)

The fade setting is checked on `- didMoveToSuperview`, but we don't
set this value until _after_ the view is already added to the hierarchy.

Moving this setting up allows the fade to work.

Author: subdigital

Source/UIScrollView+EmptyDataSet.m

@@ -448,6 +448,9 @@ - (void)dzn_reloadEmptyDataSet
 
         DZNEmptyDataSetView *view = self.emptyDataSetView;
 
+        // Configure empty dataset fade in display
+        view.fadeInOnDisplay = [self dzn_shouldFadeIn];
+        
         if (!view.superview) {
             // Send the view all the way to the back, in case a header and/or footer is present, as well as for sectionHeaders or any other content
             if (([self isKindOfClass:[UITableView class]] || [self isKindOfClass:[UICollectionView class]]) && self.subviews.count > 1) {
@@ -527,9 +530,6 @@ - (void)dzn_reloadEmptyDataSet
         // Configure empty dataset userInteraction permission
         view.userInteractionEnabled = [self dzn_isTouchAllowed];
 
-        // Configure empty dataset fade in display
-        view.fadeInOnDisplay = [self dzn_shouldFadeIn];
-        
         [view setupConstraints];
 
         [UIView performWithoutAnimation:^{