scinote-web/app/assets/stylesheets/shared/dropdown_menu.scss

.dropdown-submenu {
  background: $color-white;
  box-shadow: $flyout-shadow;
  display: none;
  left: 100%;
  list-style: none;
  min-width: 230px;
  padding-left: 0;
  position: absolute;
  top: 0;
}

.dropdown-menu li {
  position: relative;

  .caret {
    position: absolute;
    right: 1em;
    top: 1.1em;
    transform: rotate(90deg);
  }

  &:hover .dropdown-submenu,
  &.active .dropdown-submenu {
    display: block;
  }

  .caret {
    transform: rotate(90deg);
  }

}