Added support for preloading javascript libs ($template->preload_js()). Updated admin theme and Tigra Tree Menu to support this + JS_{HEADER,FOOTER} variables.

/* CSS file for table dialog in the table plugin */

.panel_wrapper div.current {
	height: 245px;
}

.advfield {
	width: 200px;
}

#class {
	width: 150px;
}