webview: Remove did-navigate workaround

The Electron bug seems to have been fixed upstream.  Meanwhile, the
workaround had been causing the app to hang if it can’t connect to an
organization at startup.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

app/renderer/js/components/webview.ts

@@ -56,11 +56,9 @@ export default class WebView {
     ) as HTMLElement;
     props.$root.append($element);
 
-    // Wait for did-navigate rather than did-attach to work around
-    // https://github.com/electron/electron/issues/31918
     await new Promise<void>((resolve) => {
       $element.addEventListener(
-        "did-navigate",
+        "did-attach",
         () => {
           resolve();
         },