Allow Node panel to open for virtual nodes (#3213)

Co-authored-by: Michael Pappas <mhagen@mapcom.com>

src/renderer/components/+nodes/node-details-resources.tsx

@@ -35,7 +35,7 @@ interface Props {
 
 export class NodeDetailsResources extends React.Component<Props> {
   toMi(resource: string) {
-    if (resource.endsWith("Ki")) {
+    if (resource?.endsWith("Ki")) {
       return `${(parseInt(resource) / 1024).toFixed(1)}Mi`;
     }