.control-treelist ol ol li{
    display: none;
}
.control-treelist ol .updated + ol>li{
    display: block;
}

.not-empty span{
    cursor: pointer;
    position: relative;
}
.not-empty span:before{
    content: '';
    display: block;
    position: absolute;
    right: 0;
    top: 13px;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid rgba(64,82,97,0.8);
    -webkit-transition: 0.3s ease-in-out;
    -moz-transition: 0.3s ease-in-out;
    -ms-transition: 0.3s ease-in-out;
    -o-transition: 0.3s ease-in-out;
    transition: 0.3s ease-in-out;
}
.not-empty.active span:before{
    transform: rotate(180deg);
}