update + cleanup

- update electron
- cleanup unused function calls
- close websocket on process end
- style fix on splash screen

server/src/app.js

@@ -128,4 +128,7 @@ export const shutdown = () => {
   // shutdown OSC Server
   shutdownOSCServer();
   // shutdown OSC Client
+
+  // shutdown timer
+  global.timer.shutdown();
 };