Update AbstractList.php

Author: magefan

Block/Post/PostList/AbstractList.php

@@ -59,7 +59,7 @@ abstract class AbstractList extends Template implements IdentityInterface
     protected $templatePool;
 
     const POSTS_SORT_FIELD_BY_PUBLISH_TIME = 'main_table.publish_time';
-    const POSTS_SORT_FIELD_BY_POSITION = 'main_table.position';
+    const POSTS_SORT_FIELD_BY_POSITION = 'position';
     const POSTS_SORT_FIELD_BY_TITLE = 'main_table.title';
 
     /**