fix toolbar requests for empty choice (#758)

src/Form/Extension/SelectWithApiDataExtension.php

@@ -77,6 +77,12 @@ class SelectWithApiDataExtension extends AbstractTypeExtension
             'data-related-select' => $formPrefix . $apiData['select'],
             'data-api-url' => $this->router->generate($apiData['route'], $apiData['route_params']),
         ]);
+
+        if (isset($apiData['empty_route_params'])) {
+            $view->vars['attr'] = array_merge($view->vars['attr'], [
+                'data-empty-url' => $this->router->generate($apiData['route'], $apiData['empty_route_params']),
+            ]);
+        }
     }
 
     /**

src/Form/Toolbar/AbstractToolbarForm.php

@@ -129,6 +129,7 @@ abstract class AbstractToolbarForm extends AbstractType
             'required' => false,
             'activity_enabled' => true,
             'choices' => [],
+            'disabled' => true,
         ]);
 
         $builder->addEventListener(

src/Form/Type/ProjectType.php

@@ -74,6 +74,7 @@ class ProjectType extends AbstractType
                     'select' => 'activity',
                     'route' => 'get_activities',
                     'route_params' => ['project' => '-s-', 'orderBy' => 'name', 'visible' => $options['activity_visibility']],
+                    'empty_route_params' => ['globals' => 'true', 'orderBy' => 'name', 'visible' => $options['activity_visibility']],
                 ];
             }