message: deprecated comment removed
diff: <div class="btn-wrapper">
  <app-button-save-cancel>
  <ng-container left>
  - <!-- Add here Elements before save & cancel buttons -->
  - <!-- Don't forget type="button" on Buttons -->
  + <!-- Add Elements left to the save & cancel buttons -->
  <button type="button" *ngIf="type == 'code-kata'" mat-raised-button (click)="codeKataUnitFormComponent.validate()">Validate</button>
  <button type="button" *ngIf="type == 'file'" mat-raised-button (click)="fileUnitFormComponent.openAddFilesDialog()">Add Files</button>
  <button type="button" *ngIf="type == 'video'" mat-raised-button (click)="fileUnitFormComponent.openAddFilesDialog()">Add Videos</button>
  </ng-container>
  <ng-container right>
  - <!-- Add here Elements after save & cancel buttons -->
  + <!-- Add here Elements right to the save & cancel buttons -->
  <button type="button" *ngIf="type == 'free-text'" mat-raised-button color="secondary"
  (click)="freeTextUnitFormComponent.openFullscreen()">Fullscreen</button>
  