confirmation message now listen from submit event of the form

Author: yceruto

app/Resources/views/admin/blog/_form.html.twig

@@ -6,7 +6,11 @@
     {{ form_start(form, { attr: { novalidate: 'novalidate' } }) }}
 #}
 
-{{ form_start(form) }}
+{% if confirmation_message is defined %}
+    {% set attr = {'data-confirmation-message': confirmation_message} %}
+{% endif %}
+
+{{ form_start(form, {attr: attr|default({})}) }}
     {{ form_widget(form) }}
 
     <input type="submit" value="{{ button_label|default('label.create_post'|trans) }}"

app/Resources/views/base.html.twig

@@ -155,8 +155,8 @@
                 $(document).ready(function() {
                     hljs.initHighlightingOnLoad();
 
-                    $('[data-toggle="confirmation"][data-message]').on('click', function (event) {
-                        var message = $(this).data('message');
+                    $('form[data-confirmation-message]').on('submit', function (event) {
+                        var message = $(this).data('confirmation-message');
 
                         if (confirm(message) === false) {
                             //cancel the event