li.plugin[data-key="webhookin"] span.icon {
  background: none !important;
}

li.plugin[data-key="webhookin"] span.icon::before {
  content: "";
  display: inline-block;
  width: 48px;
  height: 48px;
  background: url("/plugins/webhookin/pics/logo.gif") no-repeat center/contain;
}

li.plugin[data-key="webhookin"] span.icon .icon-text {
  display: none !important;
}