persist dataSource when swictching between sideNav

Signed-off-by: Riya Saxena <[email protected]>

public/pages/Main/Main.js

@@ -32,7 +32,7 @@ class Main extends Component {
     flyout: null,
     selectedDataSourceId: undefined,
     dataSourceLoading: this.props.dataSourceEnabled,
-  }
+  };
   async componentDidMount() {
     if (this.context) {
       this.updateBreadcrumbs();