person: re-add accpet email and add possibility of hidding this field

src/Bundle/ChillPersonBundle/Resources/views/Person/edit.html.twig

@@ -95,6 +95,11 @@
             <div id="personEmail">
                 {{ form_row(form.email, {'label': 'Email'}) }}
             </div>
+        {% endif %}
+        {%- if form.acceptEmail is defined -%}
+            <div id="personAcceptEmail">
+                {{ form_row(form.acceptEmail, {'label' : 'Accept emails ?'}) }}
+            </div>
         {%- endif -%}
 
         {%- if form.phonenumber is defined -%}