refactor: get server version via backend method

Avoid touching the server directly. Maintains consistency with existing
workflow and centralizes changes in the event that, for example, auth
requirements change for this route.

packages/desktop-client/src/components/Settings.js

@@ -477,17 +477,12 @@ function Version() {
   let [version, setVersion] = useState('');
 
   useEffect(async () => {
-    const url = await send('get-server-url');
-    if (!url || url.indexOf('not-configured') !== -1) return;
+    const { error, version } = await send('get-server-version');
 
-    try {
-      const res = await fetch(url + '/info');
-      if (!res.ok) return;
-
-      const info = await res.json();
-      setVersion((info && info.build.version) || '');
-    } catch (e) {
+    if (error) {
       setVersion('');
+    } else {
+      setVersion(version);
     }
   }, []);