MediaWiki:Group-steward.css

/* Show hidden items that have class="checkuser-show". */
div.checkuser-show,
p.checkuser-show {
  display: block !important;
}
span.checkuser-show,
small.checkuser-show {
  display: inline !important;
}
table.checkuser-show {
  display: table !important;
}
li.checkuser-show {
  display: list-item !important;
}