Dear Friends!
Stumbling upon a nearly decade-old post, I'd like to note that the code can be simplified even more...
Thank you!
1.
initialization
...
UniAddCSSLibrary('build/packages/ux/classic/classic/resources/ux-all.css', False, [upoFolderJS, upoPlatformDesktop]);
UniAddJSLibrary('build/packages/ux/classic/ux.js', False, [upoFolderJS, upoPlatformDesktop]);
2.
function pagingBar.beforeInit(sender, config)
{
config.displayInfo = true;
config.plugins = {
'ux-progressbarpager': {
width: '300px'
}
};
}