Fixes bug on enumerating datasets at DMP Wizard 3d step when remove all datasets and then add new.

dmp-frontend/src/app/ui/quick-wizard/dataset-editor/dataset-editor-wizard.component.ts

@@ -81,6 +81,9 @@ export class DatasetEditorWizardComponent extends BaseComponent implements OnIni
 		this.editedDataset = false;
 		this._inputValue = "list";
 		(this.formGroup.get('datasets').get('datasetsList') as FormArray).removeAt(index);
+		if (index == 0) {
+			this.isFirst = true;
+		}
 	}
 
 	addDataset(isFirst: boolean) {