chore(*): add missing import

Author: dobromirts

live-editing/configs/PivotGridConfigGenerator.ts

@@ -10,7 +10,8 @@ import {
     IgxToastModule,
     IgxSwitchModule,
     IgxExcelExporterService,
-    IgxIconModule
+    IgxIconModule,
+    IgxCheckboxModule
 } from 'igniteui-angular';
 import { AppModuleConfig, Config, IConfigGenerator } from 'igniteui-live-editing';
 export class PivotGridConfigGenerator implements IConfigGenerator {