.vertical-separator.backend {
    border-right: 1px solid black;
    height: 100%;
    min-height: 100px;
}

.vertical-separator {
    border-right: 1px solid black;
}

.vertical-separator.bstyle-solid {
    border-right-style: solid;
}
.vertical-separator.bstyle-dashed {
    border-right-style: dashed;
}