[player] Rename selector of HideFirstChildDirective

projects/player/src/app/components/layout/layout.component.html

@@ -71,7 +71,7 @@
 
 <ng-template #scrollPagesSeparatedView let-pagesContainer>
   <mat-tab-group
-      appHideFirstChild
+      aspectHideFirstChild
       [hideFirstChild]="hidePageLabels"
       (childHeight)="tabHeaderHeight = $event"
       mat-align-tabs="start"

projects/player/src/app/directives/hide-first-child.directive.ts

@@ -7,7 +7,7 @@ import { takeUntil } from 'rxjs/operators';
 import { NativeEventService } from '../services/native-event.service';
 
 @Directive({
-  selector: '[appHideFirstChild]'
+  selector: '[aspectHideFirstChild]'
 })
 export class HideFirstChildDirective implements OnInit, AfterViewInit, OnDestroy {
   @Input() hideFirstChild!: boolean;