Allow Pick*Type to submit the form when selection an entity, and apply inside Event

src/Bundle/ChillEventBundle/Resources/views/Event/show.html.twig

@@ -136,11 +136,8 @@
                     'class' : 'custom-select',
                     'style': 'min-width: 15em; max-width: 18em; display: inline-block;'
                 }} ) }}
-                <div class="input-group-append">
-                    {{ form_widget(form_add_participation_by_person.submit, { 'attr' : { 'class' : 'btn btn-create' } } ) }}
-                </div>
             </div>
-            {{ form_rest(form_add_participation_by_person) }}
+            <input type="hidden" name="returnPath" value="{{ app.request.requestUri }}" />
             {{ form_end(form_add_participation_by_person) }}
         </div>