[Fix] Gest columns ´date postulation` method refactor

- Style for the `date de naissance` column

Gestion/src/views/ApplicationsView.vue

@@ -57,7 +57,7 @@
             <td>{{ props.item.applicant_address_street }} {{ props.item.applicant_address_npa }}</td>
             <td>{{ props.item.applicant_mail }}</td>
             <td>
-              {{ props.item.applicant_birthdate }},
+              {{ props.item.applicant_birthdate }}
             </td>
             <td>
               <span
@@ -210,10 +210,10 @@ export default {
         return date > this.$store.state.moduleUser.lastConnection.last_connection_date
       }
     },
-    getFormatedDate (value) {
-      const dateTimePart = value.split(/[- :]/)[1] - 1
-      const date = new Date(dateTimePart)
-      return date.getDate() + '/' + (date.getMonth() + 1) + '/' + date.getFullYear() + ' à ' + ('0' + date.getHours()).slice(-2) + ':' + ('0' + date.getMinutes()).slice(-2)
+    getFormatedDate(value) {
+      const date = new Date(value);
+      const formattedDate = `${date.getDate()}/${date.getMonth() + 1}/${date.getFullYear()} à ${('0' + date.getHours()).slice(-2)}:${('0' + date.getMinutes()).slice(-2)}`;
+      return formattedDate;
     },
     customSort: function (items, column, descending) {