Fixed some components not destroying their ViewContainerRef

src/app/item-page/edit-item-page/item-bitstreams/item-edit-bitstream-bundle/item-edit-bitstream-bundle.component.ts

@@ -1,4 +1,4 @@
-import { Component, EventEmitter, Input, OnInit, Output, ViewChild, ViewContainerRef } from '@angular/core';
+import { Component, EventEmitter, Input, OnInit, Output, ViewChild, ViewContainerRef, OnDestroy } from '@angular/core';
 import { Bundle } from '../../../../core/shared/bundle.model';
 import { Item } from '../../../../core/shared/item.model';
 import { ResponsiveColumnSizes } from '../../../../shared/responsive-table-sizes/responsive-column-sizes';
@@ -15,7 +15,7 @@ import { getItemPageRoute } from '../../../item-page-routing-paths';
  * Creates an embedded view of the contents. This is to ensure the table structure won't break.
  * (which means it'll be added to the parents html without a wrapping ds-item-edit-bitstream-bundle element)
  */
-export class ItemEditBitstreamBundleComponent implements OnInit {
+export class ItemEditBitstreamBundleComponent implements OnInit, OnDestroy {
 
   /**
    * The view on the bundle information and bitstreams
@@ -63,4 +63,9 @@ export class ItemEditBitstreamBundleComponent implements OnInit {
     this.viewContainerRef.createEmbeddedView(this.bundleView);
     this.itemPageRoute = getItemPageRoute(this.item);
   }
+
+  ngOnDestroy(): void {
+    this.viewContainerRef.clear();
+  }
+
 }

src/app/item-page/edit-item-page/item-bitstreams/item-edit-bitstream-drag-handle/item-edit-bitstream-drag-handle.component.ts

@@ -1,4 +1,4 @@
-import { Component, OnInit, ViewChild, ViewContainerRef } from '@angular/core';
+import { Component, OnInit, ViewChild, ViewContainerRef, OnDestroy } from '@angular/core';
 
 @Component({
   selector: 'ds-item-edit-bitstream-drag-handle',
@@ -10,7 +10,7 @@ import { Component, OnInit, ViewChild, ViewContainerRef } from '@angular/core';
  * Creates an embedded view of the contents
  * (which means it'll be added to the parents html without a wrapping ds-item-edit-bitstream-drag-handle element)
  */
-export class ItemEditBitstreamDragHandleComponent implements OnInit {
+export class ItemEditBitstreamDragHandleComponent implements OnInit, OnDestroy {
   /**
    * The view on the drag-handle
    */
@@ -23,4 +23,8 @@ export class ItemEditBitstreamDragHandleComponent implements OnInit {
     this.viewContainerRef.createEmbeddedView(this.handleView);
   }
 
+  ngOnDestroy(): void {
+    this.viewContainerRef.clear();
+  }
+
 }

src/app/item-page/edit-item-page/item-bitstreams/item-edit-bitstream/item-edit-bitstream.component.ts

@@ -1,4 +1,4 @@
-import { Component, Input, OnChanges, OnInit, SimpleChanges, ViewChild, ViewContainerRef } from '@angular/core';
+import { Component, Input, OnChanges, OnDestroy, OnInit, SimpleChanges, ViewChild, ViewContainerRef } from '@angular/core';
 import { Bitstream } from '../../../../core/shared/bitstream.model';
 import { cloneDeep } from 'lodash';
 import { ObjectUpdatesService } from '../../../../core/data/object-updates/object-updates.service';
@@ -21,7 +21,7 @@ import { getBitstreamDownloadRoute } from '../../../../app-routing-paths';
  * Creates an embedded view of the contents
  * (which means it'll be added to the parents html without a wrapping ds-item-edit-bitstream element)
  */
-export class ItemEditBitstreamComponent implements OnChanges, OnInit {
+export class ItemEditBitstreamComponent implements OnChanges, OnDestroy, OnInit {
 
   /**
    * The view on the bitstream
@@ -72,6 +72,10 @@ export class ItemEditBitstreamComponent implements OnChanges, OnInit {
     this.viewContainerRef.createEmbeddedView(this.bitstreamView);
   }
 
+  ngOnDestroy(): void {
+    this.viewContainerRef.clear();
+  }
+
   /**
    * Update the current bitstream and its format on changes
    * @param changes