Only update selected if different from current

src/js/app.tsx

@@ -64,10 +64,12 @@ export class App extends React.Component<AppProps, AppState> {
     }
 
     updateSelect(selected: string): void {
+        if (selected !== this.state.selectedStream) {
             this.setState((state) => {
                 return { streamList: state.streamList, selectedStream: selected }
             })
         }
+    }
 
     render() {
         return (