workspace.admin.css in Workspace 8

.item-list ul.workspace,
.item-list ul.workspace ul {
    padding-top: 20px;
    position: relative;
    margin: 0;
}

.item-list .workspace li {
    float: left;
    text-align: center;
    list-style-type: none;
    position: relative;
    padding: 20px 5px 0;
    margin: 0;
}

/* We will use ::before and ::after to draw the connectors */
.item-list .workspace li::before,
.item-list .workspace li::after {
    content: '';
    position: absolute;
    top: 0;
    right: 50%;
    border-top: 1px solid #ccc;
    width: 50%;
    height: 20px;
}
.item-list .workspace li::after {
    right: auto;
    left: 50%;
    border-left: 1px solid #ccc;
}

/* We need to remove left-right connectors from elements without any siblings */
.item-list .workspace li:only-child::after,
.item-list .workspace li:only-child::before {
    display: none;
}

/* Remove space from the top of single children */
.item-list .workspace li:only-child{
    padding-top: 0;
}

/* Remove left connector from first child and right connector from last child*/
.item-list .workspace li:first-child::before,
.item-list .workspace li:last-child::after {
    border: 0 none;
}

/* Adding back the vertical connector to the last nodes */
.item-list .workspace li:last-child::before {
    border-right: 1px solid #ccc;
}

/* Downward connector from parents */
.item-list ul.workspace ul::before,
.item-list ul.workspace ul ul::before {
    content: '';
    position: absolute; top: 0; left: 50%;
    border-left: 1px solid #ccc;
    width: 0;
    height: 20px;
}

.item-list .workspace .rev,
.item-list .workspace .rev__title {
    display: inline-block;
    margin: 0;
}

.item-list .workspace .panel__title {
    padding: 0;
}

.item-list .workspace hr {
    margin: 5px 0;
}

.rev {
    margin: 0px 0px 20px;
    padding: 9px;
    background: #F8F8F8;
    border: 1px solid #CCC
}

.rev__title {
    font-size: 1em;
    text-transform: uppercase;
    margin: 0px;
}