Custom stylesheet included only for dashboard table.

ApplicationDelegate.php

<?php
class conf_ApplicationDelegate {
  function beforeHandleRequest(){
    $app = Dataface_Application::getInstance();
    $query = $app->getQuery();
    $app->addHeadContent('<link rel="stylesheet" type="text/css" href="style.css"/>');
    if ( $query['-table'] == 'dashboard' ){
      $app->addHeadContent('<link rel="stylesheet" type="text/css" href="dashboard.css"/>');
    }
  }

dashboard.css

div#top-search-form {display:none;}