@mixin deja-tree-list-borders() {
    #listheader {
        border-top: solid 1px rgba(0, 0, 0, 0.2);
        border-left: solid 1px rgba(0, 0, 0, 0.2);
        border-right: solid 1px rgba(0, 0, 0, 0.2);
    }
    .deja-listcontainer {
        border: solid 1px rgba(0, 0, 0, 0.2);
    }
}