message: Dialog now only closes on clicking out.
diff: @@ -78,7 +78,6 @@ export class SelectUnitDialogComponent implements OnInit {
  const response = <Response> await this.downloadReq.getFile(result.toString());
  saveAs(response.body, this.saveFileService.replaceCharInFilename(this.course.name) + '.zip');
  this.showSpinner = false;
  - this.dialogRef.close();
  } else {
  this.showSpinner = false;
  this.snackBar.open('Some selected files are too big! Please download Units with a Download-Button seperately!',
  