message: Make import specific to button-toggle
diff: @@ -79,7 +79,7 @@ import { MatMenuModule } from '@angular/material/menu'
  import { MatListModule } from '@angular/material/list'
  import { TokenSaleComponent } from './token-sale/token-sale.component'
  import { ProductReviewEditComponent } from './product-review-edit/product-review-edit.component'
  -import { MatButtonToggleModule } from '@angular/material'
  +import { MatButtonToggleModule } from '@angular/material/button-toggle'
  export function HttpLoaderFactory (http: HttpClient) {
  return new TranslateHttpLoader(http,'./../assets/i18n/' , '.json')
  