Fix news component loading without author

frontend/src/app/modules/grids/widgets/news/news.component.html

@@ -10,12 +10,14 @@
   <ul class="widget-box--arrow-links">
     <li class="-widget-box--arrow-multiline" *ngFor="let news of entries">
       <div>
+        <ng-container *ngIf="news.author">
         <img class="avatar avatar-mini avatar--fallback"
              data-avatar-fallback-remove="true"
              *ngIf="newsAuthorAvatar(news)"
              [attr.src]="newsAuthorAvatar(news)"
              [attr.title]="newsAuthorName(news)"
              [attr.alt]="newsAuthorName(news)" />
+        </ng-container>
         <a [href]="newsProjectPath(news)"
            [textContent]="newsProjectName(news)">
         </a>:
@@ -23,7 +25,8 @@
            [textContent]="news.title">
         </a>
 
-        <p class="widget-box--additional-info">
+        <p *ngIf="news.author"
+           class="widget-box--additional-info">
           {{text.createdBy}}
           <a [href]="newsAuthorPath(news)"
              [textContent]="newsAuthorName(news)">

frontend/src/app/modules/grids/widgets/news/news.component.ts

@@ -40,6 +40,10 @@ export class WidgetNewsComponent extends AbstractWidgetComponent implements OnIn
         this.entriesLoaded = true;
 
         this.entries.forEach((entry) => {
+          if (!entry.author) {
+            return;
+          }
+
           this.userCache
             .require(entry.author.idFromLink)
             .then((user:UserResource) => {