core/src/main/resources/org/apache/karaf/webconsole/core/table/actions.css

div.actions ul {
    margin: 0px;
    padding: 0px;
}

div.actions ul li {
    list-style-type: none;
    display: inline;
}

div.actions ul li.node, div.actions ul li.last {
    padding-left: 10px;
}