set change detection on push

src/app/modules/shows/show/song/song.component.html

@@ -1,9 +1,12 @@
 <div *ngIf="iSong && iSong && show">
-  <div @fade *ngIf="show.published" class="title published">{{ iSong.key }} - {{ iSong.title }}</div>
+  <div *ngIf="show.published" class="title published">
+    <div class="key">{{ iSong.key }}</div>
+    <div>{{ iSong.title }}</div>
+  </div>
 
-  <div @fade *ngIf="!show.published" class="song">
+  <div *ngIf="!show.published" class="song">
     <span class="title">{{ iSong.title }}</span>
-    <span @fade class="keys" *ngIf="!edit">
+    <span *ngIf="!edit" class="keys">
       <span *ngIf="iSong.keyOriginal !== iSong.key">{{ iSong.keyOriginal }}&nbsp;→&nbsp;</span>
       <mat-form-field *ngIf="keys" appearance="standard" class="keys">
         <mat-select [formControl]="keyFormControl">
@@ -11,26 +14,27 @@
         </mat-select>
       </mat-form-field>
     </span>
-    <app-menu-button @fade *ngIf="!edit" (click)="onEdit()" [icon]="faEdit" class="btn-edit btn-icon" matTooltip="Lied für diese Veranstaltung bearbeiten"> </app-menu-button>
-    <app-menu-button @fade *ngIf="!edit" (click)="onDelete()" [icon]="faDelete" class="btn-delete btn-icon" matTooltip="Lied aus Veranstaltung entfernen"></app-menu-button>
+    <app-menu-button (click)="onEdit()" *ngIf="!edit" [icon]="faEdit" class="btn-edit btn-icon"
+                     matTooltip="Lied für diese Veranstaltung bearbeiten"></app-menu-button>
+    <app-menu-button (click)="onDelete()" *ngIf="!edit" [icon]="faDelete" class="btn-delete btn-icon"
+                     matTooltip="Lied aus Veranstaltung entfernen"></app-menu-button>
   </div>
 
-  <mat-form-field @fade appearance="outline" *ngIf="edit" >
+  <mat-form-field *ngIf="edit" appearance="outline">
     <mat-label>Songtext</mat-label>
     <textarea matTooltip="Tonart ändern"
-      [cdkTextareaAutosize]="true"
-      [formControl]="editSongControl"
-      matInput
+              [cdkTextareaAutosize]="true"
+              [formControl]="editSongControl"
+              matInput
     ></textarea>
   </mat-form-field>
-  <div @fade *ngIf="edit">Es wird nur der Liedtext für dieser Veranstaltung geändert.</div>
-  <app-button-row @fade *ngIf="edit">
+  <div *ngIf="edit">Es wird nur der Liedtext für dieser Veranstaltung geändert.</div>
+  <app-button-row *ngIf="edit">
     <app-button (click)="onSave()" [icon]="faSave">Speichern</app-button>
     <app-button (click)="onDiscard()" [icon]="faEraser">Verwerfen</app-button>
   </app-button-row>
 
   <app-song-text
-    @fade
     (chordModeChanged)="onChordModeChanged($event)"
     *ngIf="!edit && (showText )"
     [chordMode]="iSong.chordMode"