message: fixed bug in filter
diff: @@ -453,7 +453,8 @@ export class FilterHelper<rowType extends Entity<any>> {
  addToFindOptions(opt: FindOptionsPerEntity<rowType>) {
  this.filterColumns.forEach(c => {
  if (opt.where) {
  - opt.where = r => new AndFilter(opt.where(r), c.isEqualTo(this.filterRow.__getColumn(c).value));
  + let x = opt.where;
  + opt.where = r => new AndFilter(x(r), c.isEqualTo(this.filterRow.__getColumn(c).value));
  }
  else opt.where = r => c.isEqualTo(this.filterRow.__getColumn(c).value);
  