style.css

/*
 * Render a tree of objects
 *
 * @package     Task
 * @author      Vallo Reima
 * @copyright   (C)2015
*/
html, body {
  font-family: Verdana, Arial, Helvetica, sans-serif;
  font-size: 100%;
  overflow: auto;
}
.tree {
   margin-left: 1em;
}
.command {
 margin-bottom: 1em;
}
.command button {
}
.enabled:hover {
  cursor: pointer;
}
.tree ul {
  list-style: none;
  margin-top: 0.5em;
  padding: 0;
}
.tree li {
  padding-top: 0.25em;
}
.tree img:hover {
  cursor: pointer;
}
.tree ul li {
  font-size: 0.93em;
}
.tree ul ul {
  display: none;
}
.tree ul ul li {
  margin-left: 1.0em;
}
.tree img {
  margin-right: 0.3em;
}
.tree span {
  color: black;
  text-decoration: none;
}
.tree span:hover{
  background-color: #dddddd;
  cursor: default;
}
.selected{
  background-color: #cccccc;
}
.hide{
  display:none;
}