dataset-wizard.component.ts & dmp-editor.component.ts & form-validation-errors-dialog.component.ts:
a. For 'mat-select', use placeholder instead of aria-label.
b. [Bug fix] For 'app-multiple-auto-complete' dig into 2 more levels (formControl.nativeElement.firstChild.firstChild.firstChild.children) --> reason: commit de99784b5e: moved <input> inside <mat-chip-list>.