Fix typo (ported from !634)

interface/web/admin/lib/lang/ar_directive_snippets.lng

interface/web/admin/lib/lang/bg_directive_snippets.lng

interface/web/admin/lib/lang/ca_directive_snippets.lng

interface/web/admin/lib/lang/cz_directive_snippets.lng

interface/web/admin/lib/lang/de_directive_snippets.lng

interface/web/admin/lib/lang/dk_directive_snippets.lng

interface/web/admin/lib/lang/el_directive_snippets.lng

interface/web/admin/lib/lang/en_directive_snippets.lng

interface/web/admin/lib/lang/es_directive_snippets.lng

interface/web/admin/lib/lang/fi_directive_snippets.lng

interface/web/admin/lib/lang/fr_directive_snippets.lng

interface/web/admin/lib/lang/hr_directive_snippets.lng

interface/web/admin/lib/lang/hu_directive_snippets.lng

interface/web/admin/lib/lang/id_directive_snippets.lng

interface/web/admin/lib/lang/it_directive_snippets.lng

interface/web/admin/lib/lang/ja_directive_snippets.lng

interface/web/admin/lib/lang/pl_directive_snippets.lng

interface/web/admin/lib/lang/pt_directive_snippets.lng

interface/web/admin/lib/lang/ro_directive_snippets.lng

interface/web/admin/lib/lang/se_directive_snippets.lng