Patch to make gallery-datatable-350-preview scrollable extension work

gistfile1.js

YUI.add('gallery-getscrollbarwidth', function (Y) {
    Y.DOM.getScrollbarWidth = Y.cached(function () {
        var doc = Y.config.doc,
            testNode = doc.createElement('div'),
            body = doc.getElementsByTagName('body')[0],
            // 0.1 because cached doesn't support falsy refetch values
            width    = 0.1;

        if (body) {
            testNode.style.cssText = "position:absolute;visibility:hidden;overflow:scroll;width:20px;";
            testNode.appendChild(doc.createElement('p')).style.height = '1px';
            body.insertBefore(testNode, body.firstChild);
            width = testNode.offsetWidth - testNode.clientWidth;

            body.removeChild(testNode);
        }

        return width;
    }, null, 0.1);
}, '0.1', { requires: ['dom-screen'] });