[editor] Fix ignore-counter icon

projects/editor/src/app/app.component.ts

@@ -27,13 +27,9 @@ export class AppComponent implements OnInit {
 
   constructor(private unitService: UnitService,
               private translateService: TranslateService,
-              private veronaApiService: VeronaAPIService,
-              private matIconRegistry: MatIconRegistry,
-              private domSanitizer: DomSanitizer) {
+              private veronaApiService: VeronaAPIService) {
     translateService.addLangs(['de']);
     translateService.setDefaultLang('de');
-    this.matIconRegistry.addSvgIcon('playlist_remove',
-      this.domSanitizer.bypassSecurityTrustResourceUrl('assets/playlist_remove.svg'));
   }
 
   ngOnInit(): void {

projects/editor/src/app/components/unit-view/canvas/section-menu.component.ts

@@ -48,7 +48,9 @@ import { SectionService } from 'editor/src/app/services/unit-services/section.se
     <button mat-mini-fab [color]="section.ignoreNumbering ? 'primary' : 'accent'"
             (click)="ignoreNumbering()"
             [matTooltip]="'Von der Nummerierung ausnehmen'" [matTooltipPosition]="'left'">
-      <mat-icon>playlist_remove</mat-icon>
+      <svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px" fill="white">
+        <path d="m576-80-56-56 104-104-104-104 56-56 104 104 104-104 56 56-104 104 104 104-56 56-104-104L576-80ZM120-320v-80h280v80H120Zm0-160v-80h440v80H120Zm0-160v-80h440v80H120Z"/>
+      </svg>
     </button>