MediaWiki:Gadget-CustomSidebar.css

.cs-linkfield + .cs-linkfield {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid grey;
}
.cs-editbutton {
    float: right;
}
.cs-editbutton .oo-ui-icon-settings {
    transform: scale(0.65) !important;
}
.cs-nolinkmessage {
    text-align: center;
    margin-top: 100px;
    font-style: italic;
}