[ui] enable keepalive on requests

ui/src/lib/entity.ts

@@ -67,7 +67,7 @@ export async function queryOnce(query: string): Promise<OrderedListing> {
     if (!inFlightRequests[url]) {
       console.debug(`Querying: ${query}`);
       inFlightRequests[url] = new Promise(async (resolve, reject) => {
-        const response = await fetch(url);
+        const response = await fetch(url, { keepalive: true });
         resolve(listingAsOrdered(await response.json()));
       });
     } else {