[ADF-3095] ability to intercept, pause and resume upload process (#3416)

* prevent and resume upload process

* upload fixes and confirmation dialog demo

* ability to toggle the upload confirmation demo

* fix tests

* unit tests

* docs update

* remove deprecation

* fix test name

demo-shell/src/app/components/files/files.component.html

@@ -39,7 +39,8 @@
                               [rootFolderId]="getDocumentListCurrentFolderId()"
                               [versioning]="versioning"
                               [adf-node-permission]="'create'"
-                              [adf-nodes]="disableDragArea ? getCurrentDocumentListNode() : []">
+                              [adf-nodes]="disableDragArea ? getCurrentDocumentListNode() : []"
+                              (beginUpload)="onBeginUpload($event)">
             <div *ngIf="errorMessage" class="error-message">
                 <button (click)="resetError()" mat-icon-button>
                     <mat-icon>highlight_off</mat-icon>
@@ -500,6 +501,12 @@
             </mat-slide-toggle>
         </section>
 
+        <section>
+            <mat-slide-toggle color="primary" [(ngModel)]="warnOnMultipleUploads">
+                {{'APP.WARN-MULTIPLE-UPLOADS' | translate}}
+            </mat-slide-toggle>
+        </section>
+
         <h5>Upload</h5>
         <section *ngIf="acceptedFilesTypeShow">
             <mat-form-field floatPlaceholder="float">