<vn-popover vn-id="popover">
    <vn-spinner
        ng-if="$ctrl.worker == null"
        style="padding: 1em;"
        enable="true">
    </vn-spinner>
    <vn-worker-descriptor 
        ng-if="$ctrl.worker"
        worker="$ctrl.worker" 
        quicklinks="$ctrl.quicklinks">
    </vn-worker-descriptor>
</vn-popover>