i5934 fix override of max_date on taxshelter generation

modules/shareholder_register_taxshelter/src/Form/ShareholderRegisterTaxshelter.php

@@ -78,7 +78,6 @@ class ShareholderRegisterTaxshelter extends FormBase {
     ];
     $form['max_date'] = [
       '#type' => 'date',
-      '#disabled' => TRUE,
       '#title' => $this->t("Latest date for taxshelter"),
       '#default_value' => $max_date,
       '#states' => [