.hideButton {
    float: right;
    cursor: pointer;
    padding: 8px 0;
    visibility: hidden;
}

th:hover .hideButton {
    visibility: visible;
}

.hideButton:hover {
    color: red;
}

.restoreColumns {
    display: table-caption;
    padding: 10px 0;
    font-size: 10px;
    min-height: 20px;
}

.restoreColumns:after {
    content: '';
    display: block;
    clear: both;
}

.headerButton {
    display: none;
    float: left;
    padding: 5px 7px;
    cursor: pointer;
}

.headerButton:hover {
    background-color: #f6f6f6;
}