Nothing real special. The AJAX loading icon can be changed using the Javascript variable ajax_load_icon in header.tpl.
/* CSS file for cell dialog in the table plugin */
.panel_wrapper div.current {
height: 200px;
}
.advfield {
width: 200px;
}
#action {
margin-bottom: 3px;
}
#class {
width: 150px;
}