[gtk/wip/baedert/for-master] scrolledwindow: Always keep the main child first

[Timm Bäder <baedert src gnome org>]

commit e8bfd939c520c5caccbd81eb780cc2c2e1bce116
Author: Timm Bäder <mail baedert org>
Date:   Thu May 7 19:00:30 2020 +0200

    scrolledwindow: Always keep the main child first
    
    Otherwise we can't pick the scrollbars, which are allocated behind it.

 gtk/gtkscrolledwindow.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/gtkscrolledwindow.c b/gtk/gtkscrolledwindow.c
index 6f6af32a83..a778502245 100644
--- a/gtk/gtkscrolledwindow.c
+++ b/gtk/gtkscrolledwindow.c
@@ -4213,7 +4213,7 @@ gtk_scrolled_window_set_child (GtkScrolledWindow *scrolled_window,
         }
 
       priv->child = scrollable_child;
-      gtk_widget_set_parent (scrollable_child, GTK_WIDGET (scrolled_window));
+      gtk_widget_insert_after (scrollable_child, GTK_WIDGET (scrolled_window), NULL);
 
       g_object_set (scrollable_child,
                     "hadjustment", hadj,