Further update gender options

src/Bundle/ChillPersonBundle/Resources/public/vuejs/_components/OnTheFly/Person.vue

@@ -293,6 +293,10 @@ export default {
                return 'fa-mars';
             case 'both':
                return 'fa-neuter';
+           case 'unknown':
+               return 'fa-genderless';
+           default:
+               return 'fa-genderless';
          }
       },
       genderTranslation() {
@@ -303,6 +307,10 @@ export default {
                return 'person.gender.man';
             case 'both':
                return 'person.gender.both';
+           case 'unknown':
+               return 'person.gender.unknown';
+           default:
+               return 'person.gender.unknown';
          }
       },
       feminized() {