table.treetable span.indenter {
  display: inline-block;
  margin: 0;
  padding: 0;
  text-align: right;
  margin-right: 5px;

  /* Disable text selection of nodes (for better D&D UX) */
  user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -o-user-select: none;
  -webkit-user-select: none;

  /* Force content-box box model for indenter (Bootstrap compatibility) */
  -webkit-box-sizing: content-box;
  -moz-box-sizing: content-box;
  box-sizing: content-box;

  width: 19px;
}

table.treetable tbody tr.collapsed span.indenter a {
  background-image: url("32px.png");
  background-position: -4px -39px;
  background-color: transparent; 
  background-repeat: no-repeat;
  display: inline-block;
  text-decoration: none;
  width: 25px;
}

table.treetable tbody tr.expanded span.indenter a {
  background-image: url("32px.png");
  background-position: -35px -39px;
  background-color: transparent; 
  background-repeat: no-repeat;
  display: inline-block;
  text-decoration: none;
  width: 25px;
}