Add ScrollManager to global ipy namespace in main.js instead of,

in the bottom of the scroll manager js file.

IPython/html/static/notebook/js/scrollmanager.js

@@ -1,87 +1,84 b''
 // Copyright (c) IPython Development Team.
 // Distributed under the terms of the Modified BSD License.
 define([], function(){
     "use strict";
 
     var ScrollManager = function (notebook) {
         // Public constructor.
         this.notebook = notebook;
         this.animation_speed = 250; //ms
     };
 
     ScrollManager.prototype.scroll = function (delta) {
         // Scroll the document.
         //
         // Parameters
         // ----------
         // delta: integer
         //  direction to scroll the document.  Positive is downwards.
 
         // If one or more slides exist, scroll to the slide.
         var $slide_cells = $('.slideshow-slide');
         if ($slide_cells.length > 0) {
             var i, cell;
 
             // Get the active slide cell index.
             var selected_index = this.notebook.find_cell_index(this.notebook.get_selected_cell());
             var active_slide = -1;
             var cells = this.notebook.get_cells();
             for (i = selected_index; i >= 0; i--) {
                 cell = cells[i];
                 var ns = cell.metadata.slideshow;
                 if (ns && ns.slide_type == 'slide') {
                     active_slide = i;
                     break;
                 }
             }
             
             // Translate cell index into slide cell index.
             if (active_slide != -1) {
                 for (i = 0; i < $slide_cells.length; i++) {
                     if (cells[active_slide].element[0] == $slide_cells[i]) {
                         active_slide = i;
                         break;
                     }
                 } 
             }
         
             // Scroll.
             if (active_slide != -1 || delta > 0) {
                 active_slide += delta;
                 active_slide = Math.max(0, Math.min($slide_cells.length-1, active_slide));
                 
                 var cell_element = $slide_cells[active_slide];
                 cell = $(cell_element).data('cell');
                 this.notebook.select(this.notebook.find_cell_index(cell));
                 
                 this.scroll_to(cell_element);
                 //cell_element.scrollIntoView(true);
             }
 
             // Cancel browser keyboard scroll.
             return false;
         
         // No slides exist, scroll up or down one page height.  Instead of using
         // the browser's built in method to do this, animate it using jQuery.
         } else {
             this.scroll_some(delta);
             return false;
         }
     };
 
     ScrollManager.prototype.scroll_to = function(destination) {
         // Scroll to an element in the notebook.
         $('#notebook').animate({'scrollTop': $(destination).offset().top + $('#notebook').scrollTop() - $('#notebook').offset().top}, this.animation_speed);
     };
 
     ScrollManager.prototype.scroll_some = function(pages) {
         // Scroll up or down a given number of pages.
         $('#notebook').animate({'scrollTop': $('#notebook').scrollTop() + pages * $('#notebook').height()}, this.animation_speed);
     };
 
-    // For convinience, add the ScrollManager class to the global namespace
-    IPython.ScrollManager = ScrollManager;
     // Return naemspace for require.js loads
     return ScrollManager;
-
 });