tbody.table-entity-level-body td.tree-column:first-child,
tbody.table-entity-level-header td.tree-column:first-child {
    background-image: url('../assets/images/table-tree-full.svg');
}

tbody.table-entity-level-body tr:not(:last-child) .tree-column-long {
    background-image: url(../assets/images/table-tree-long.svg);
}