message: Add missing import for mat-icon tags
diff: @@ -20,6 +20,7 @@ import { throwError } from 'rxjs/internal/observable/throwError'
  import { MatPaginatorModule } from '@angular/material/paginator'
  import { MatCardModule } from '@angular/material/card'
  import { MatDividerModule } from '@angular/material/divider'
  +import { MatIconModule } from '@angular/material/icon'
  describe('AdministrationComponent', () => {
  let component: AdministrationComponent
  @@ -47,7 +48,8 @@ describe('AdministrationComponent', () => {
  MatDialogModule,
  MatPaginatorModule,
  MatDividerModule,
  - MatCardModule
  + MatCardModule,
  + MatIconModule
  ],
  declarations: [ AdministrationComponent ],
  providers: [
  