Fix: optimization

htdocs/admin/delais.php

htdocs/langs/ar_SA/admin.lang

htdocs/langs/ca_ES/admin.lang

htdocs/langs/da_DK/admin.lang

htdocs/langs/de_AT/admin.lang

htdocs/langs/de_DE/admin.lang

htdocs/langs/el_GR/admin.lang

htdocs/langs/en_US/admin.lang

htdocs/langs/es_ES/admin.lang

htdocs/langs/et_EE/admin.lang

htdocs/langs/fa_IR/admin.lang

htdocs/langs/fi_FI/admin.lang

htdocs/langs/fr_FR/admin.lang

htdocs/langs/he_IL/admin.lang

htdocs/langs/hu_HU/admin.lang

htdocs/langs/is_IS/admin.lang

htdocs/langs/it_IT/admin.lang

htdocs/langs/ja_JP/admin.lang

htdocs/langs/nb_NO/admin.lang

htdocs/langs/nl_BE/admin.lang