E-book viewer: When scrolling to a bookmark and the content is wider than the window, do not scroll in the horizontal direction

resources/viewer/bookmarks.js

@@ -41,6 +41,7 @@ function scroll_to_bookmark(bookmark) {
     $.scrollTo($(bm[0]), 1000,
         {
             over:ratio,
+            axis: 'y',
             onAfter:function(){window.py_bridge.animated_scroll_done()}
         }
     );