Fix order of post list returned (#10183)

api4/post.go

@@ -217,9 +217,10 @@ func getFlaggedPostsForUser(c *Context, w http.ResponseWriter, r *http.Request)
 
 		pl.AddPost(post)
 		pl.AddOrder(post.Id)
-
 	}
 
+	pl.SortByCreateAt()
+
 	if err != nil {
 		c.Err = err
 		return