Fix extensions header.

frontend/app/features/content/pages/content/content-page.component.html

@@ -48,7 +48,7 @@
                 <sqx-notifo topic="apps/{{contentsState.appId}}/schemas/{{schema?.name}}/contents/{{content.id}}"></sqx-notifo>
 
                 <ng-container *ngIf="contentTab | async; let tab">
-                    <ng-container *ngIf="tab !== 'editor'">
+                    <ng-container *ngIf="tab === 'references' || tab === 'referencing'; else defaultHeader">
                         <button type="button" class="btn btn-primary ml-1" (click)="publish()">
                             {{ 'contents.publishAll' | sqxTranslate }}
                         </button>
@@ -58,7 +58,7 @@
                         </button>
                     </ng-container>
 
-                    <ng-container *ngIf="tab === 'editor'">
+                    <ng-template #defaultHeader>
                         <sqx-preview-button [schema]="schema" [content]="content" [confirm]="confirmPreview"></sqx-preview-button>
 
                         <ng-container *ngIf="content?.canDelete">
@@ -86,7 +86,7 @@
         
                             <sqx-shortcut keys="ctrl+s" (trigger)="saveAndPublish()"></sqx-shortcut>
                         </ng-container>
-                    </ng-container>
+                    </ng-template>
                 </ng-container>
             </ng-container>