Note: After saving, you have to bypass your browser's cache to see the changes. Internet Explorer: press Ctrl-F5, Mozilla: hold down Shift while clicking Reload (or press Ctrl-Shift-R), Opera/Konqueror: press F5, Safari: hold down Shift + Alt while clicking Reload, Chrome: hold down Shift while clicking Reload.
functionaddNewpages(){mw.util.addPortletLink("p-tb","https://commons.wikimedia.org/wiki/Category:Media_requiring_renaming","File rename","tb-Rename","Access list of files to be renamed");}addOnloadHook(addNewpages);