style.css

.menu-item-separator {
  position: relative;
  opacity: 0.8;
}

.menu-item-separator > div {
  width: calc(100% - 28px);
  height: 1px;
  background-color: #9b9b9b;
  position: absolute;
  transform: translate(-50%, 50%);
  top: 50%;
  margin: auto;
  left: 50%;
}

.menu-item-separator > p {
  text-align: center;
  background-color: white;
  z-index: 1;
  margin: auto;
  padding-left: 1em;
  padding-right: 1em;
}

.menu-item-extension {
  margin-left: 1em;
  opacity: 0.4;
  font-weight: bold;
  font-size: 0.8em;
}

.menuitem.active > .menu-item-extension {
  display: none;
}