event: fix classname on event detail view

still had recommend-server class (copy/paste error)

src/ui.ts

@@ -178,7 +178,7 @@ export const renderEventDetails = (evt: Event, relay: string) => {
     elem('a', {className: 'mbox-img', href: `/${npub}`, tabIndex: -1}, img),
     body,
   ], {
-    className: 'mbox-recommend-server',
+    className: 'mbox-plain-event',
     data: {kind: evt.kind, id: evt.id, pubkey: evt.pubkey}
   });
 };