UI changes (#9823)

* fix button within button

* add subtle overlay gradient

* try disconnecting to improve memory usage

* rounded corners on gradients

web/src/components/player/MsePlayer.tsx

@@ -243,6 +243,10 @@ function MSEPlayer({ camera, className, onPlaying }: MSEPlayerProps) {
 
   useEffect(() => {
     onConnect();
+
+    return () => {
+      onDisconnect();
+    };
   }, [wsURL]);
 
   return (