plugins/CoreHome/vue/src/DropdownMenu/DropdownMenu.less

.matomo-dropdown-menu {
  position: relative;

  &::after {
    content: "▼";
    font-size: .7em;
    position: absolute;
    right: 1em;
    top: 50%;
    transform: translateY(-50%);
  }

  &.submenu::after {
    float: right;
    content: "►";
    color: @color-black-matomo;
    font-size: .6em;
  }
}

.submenu + .dropdown-content {
  left: 100%!important;
}

.submenu-container.dropdown-content {
  overflow:visible; // required for submenus to display
}