.dropdown-submenu {
  position: relative;
}


.dropdown-submenu a::after {
  transform: rotate(-90deg);
  position: absolute;
  right: 6px;
  top: .8em;
}

.dropdown-submenu .dropdown-menu {
  top: 0;
  left: 100%;
  margin-left: .1rem;
  margin-right: .1rem;
}

.jk-submenu::after{
    display:inline-block !important;
    width:0;height:0;
    margin-left:.255em;
    vertical-align:.255em;
    content:"";
    border-top:.3em solid;
    border-right:.3em solid transparent;
    border-bottom:0;
    border-left:.3em solid transparent
}