[DURACOM-145] Handled collection step

on a submission form

src/app/submission/form/collection/submission-form-collection.component.ts

@@ -64,6 +64,11 @@ export class SubmissionFormCollectionComponent implements OnChanges, OnInit {
    */
   @Input() submissionId;
 
+  /**
+   * Flag to indicate if the submission dropdown is read only
+   */
+  @Input() isReadonly = false;
+
   /**
    * An event fired when a different collection is selected.
    * Event's payload equals to new SubmissionObject.