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.
$( document ).ready(function() {
   // General usage:
   if (mw.config.get('wgNamespaceNumber') == 14 ){
   	
   	
    mw.util.addPortletLink( "p-tb", "https://veertje.toolforge.org/filelist/?cmtitle="+mw.config.get( 'wgPageName' ), "filelist" , "c-filelist", "see bare filelist" /*, id, tooltip, accesskey, nextnode */ );
   }
} );