table.dt thead .sorting {
    cursor: pointer;
    position: relative;
    user-select: none;
}

table.dt thead .sorting:after {
    position: absolute;
    top: 8px;
    right: 8px;
    display: block;
    font-family: 'Glyphicons Halflings';
    opacity: 0.2;
}
table.dt thead .sorting:after {
    content: "\e150";
}

table.dt thead .sorting.asc:after,
table.dt thead .sorting.desc:after {
    opacity: 0.5;
}

table.dt thead .sorting.asc:after {
    content: "\e155";
}
table.dt thead .sorting.desc:after {
    content: "\e156";
}