Fix for: Grid does'nt keep page(paging) on navigate with backbutton.

I really needed this function because when you edit a lot of product it's a lot of work to navigate to the current page for each product..

This extension makes i possible to keep the current page when edit a product and the navigate with the backbutton.  

$("#products-grid").kendoGrid({
                                    dataSource: dataSource,
                                    pageable: {
                                        change: function (e) {
                                            var current = parseInt(this.dataSource.page());
                                            var hashedPage = parseInt(location.hash.replace("#", ""));
                                            var equal = (parseInt(hashedPage) == parseInt(current));
                                            if (!equal) {
                                                location.hash = current;
                                            }
                                        },
                                        refresh: true,
                                        pageSizes: [@(gridPageSizes)]
                                    },
......




               $(document).ready(function () {

                    $(window).on('load', function () {

                        var hashedPage = parseInt(location.hash.replace("#", ""));
                        var grid = $('#products-grid').data('kendoGrid');
                        grid.dataSource.query({ page: parseInt(hashedPage), pageSize: 10 });
                    });

               });