tr.header1{
    cursor:pointer;
}

.header1 .sign:after{
    content:"+";
    display:inline-block;
}

.header1.expand .sign:after{
    content:"-";
 }

.sidebar-footer {
    padding: 8px 10px;
    background: #1a3a5c;
    color: #8cf;
    font-size: 11px;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.08);
    line-height: 1.4;
    flex-shrink: 0;
}