Moved from fresh theme to balham

src-large-data/index.js

@@ -5,7 +5,7 @@ import React from 'react';
 import LargeGrid from './largeGrid.jsx';
 
 import '@ag-grid-community/core/dist/styles/ag-grid.css';
-import '@ag-grid-community/core/dist/styles/ag-theme-fresh.css';
+import '@ag-grid-community/core/dist/styles/ag-theme-balham.css';
 
 // waiting for dom to load before booting react. we could alternatively
 // put the index.js reference at the end fo the index.html, but i prefer this way.

src-large-data/largeGrid.jsx

@@ -63,7 +63,7 @@ export default class MyApp extends Component {
 
     render() {
         return (
-            <div style={{height: '100%'}} className="ag-theme-fresh">
+            <div style={{height: '100%'}} className="ag-theme-balham">
                 <AgGridReact columnDefs={this.state.columnDefs} rowData={this.state.rowData} modules={AllModules}/>
             </div>
         );