bugfix: handles when no flatTreeviewPort was provided

src/components/flatTree/flatTree.component.ts

@@ -48,6 +48,13 @@ export class FlatTreeComponent implements AfterViewChecked, AfterViewInit, OnDes
     }
   }
 
+  ngOnInit(){
+    if(this.flatTreeViewPort){
+
+      this.clusterNumber = 50
+    }
+  }
+
   ngAfterViewInit(){
 
     if(this.flatTreeViewPort){
@@ -106,6 +113,7 @@ export class FlatTreeComponent implements AfterViewChecked, AfterViewInit, OnDes
   }
 
   private _currentPos : number = 0
+  public clusterNumber : number = Number.POSITIVE_INFINITY
 
   showCluster(index:number){
     return index <= this._currentPos + 1

src/components/flatTree/flatTree.template.html

 <div class="container">
-  <div *ngFor = "let flattenedItems of (inputItem | flattenTreePipe : findChildren | filterRowsByVisbilityPipe : findChildren : searchFilter | appendSiblingFlagPipe | clusteringPipe : 50 ); let index = index" clusterContainer>
+  <div *ngFor = "let flattenedItems of (inputItem | flattenTreePipe : findChildren | filterRowsByVisbilityPipe : findChildren : searchFilter | appendSiblingFlagPipe | clusteringPipe : clusterNumber ); let index = index" clusterContainer>
 
     <div [attr.clusterindex] = "index" flatTreeStart #flatTreeStart>
     </div>