[player] Clean up code

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

@@ -78,7 +78,7 @@
                  (selectedIndexChange)="onSelectedIndexChange($event)">
     <ng-container *ngFor="let page of scrollPages; let i = index; let last = last">
       <mat-tab [label]="'pageIndication' | translate: {index: i + 1}">
-        <div [style.min-height]="'calc(100vh - ' + ((page.margin * 2 + tabHeaderHeight)) + 'px)'"
+        <div [style.min-height]="'calc(100vh - ' + ((page.margin * 2) + tabHeaderHeight) + 'px)'"
              [style.background-color]="page.backgroundColor"
              [style.padding.px]="page.margin"
              [style.max-width]="page.hasMaxWidth ? page.maxWidth + 'px' : '100%'">

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

@@ -40,7 +40,7 @@ export class HideFirstChildDirective implements OnInit, AfterViewInit, OnDestroy
     }
   }
 
-  private emitHeight() {
+  private emitHeight(): void {
     this.childHeight.emit(this.elementRef.nativeElement.firstChild.offsetHeight);
   }