FEATURE [export] uncheck all centers button

src/Bundle/ChillMainBundle/Resources/views/Export/new_centers_step.html.twig

@@ -39,8 +39,13 @@
                 {{ 'This will eventually restrict your possibilities in filtering the data.'|trans }}</p>
 
             <h3 class="m-3">{{ 'Center'|trans }}</h3>
+
             {{ form_widget(form.centers.center) }}
 
+            <div class="mb-3 mt-3">
+                <input class="btn btn-misc" type= "button" onclick='uncheckAll(this)' value="{{ 'uncheck all'|trans }}"/>
+            </div>
+
             {% if form.centers.regroupment is defined %}
                 <h3 class="m-3">{{ 'Pick aggregated centers'|trans }}</h3>
                 {{ form_widget(form.centers.regroupment) }}
@@ -53,3 +58,15 @@
 
     </div>
 {% endblock content %}
+
+{% block js %}
+
+    <script>
+        const uncheckAll = () => {
+            const checkedCenters = document.getElementsByName('centers[center][]');
+
+            checkedCenters.forEach(checkbox => checkbox.checked = false)
+        }
+    </script>
+
+{% endblock js %}