bug #1403 don't access view for forms used in custom views (xabbuh)

This PR was merged into the master branch.

Discussion
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don't access view for forms used in custom views

When you create custom actions and use a form type based on the `EasyAdminFormType`, `$entityConfig[$view]` will not be set.

This is similar to the fix in #1393.

Commits
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6fceb5e don't access view for forms used in custom views

Form/Type/EasyAdminFormType.php

@@ -54,7 +54,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
         $entity = $options['entity'];
         $view = $options['view'];
         $entityConfig = $this->configManager->getEntityConfig($entity);
-        $entityProperties = $entityConfig[$view]['fields'];
+        $entityProperties = isset($entityConfig[$view]['fields']) ? $entityConfig[$view]['fields'] : array();
         $formGroups = array();
         $currentFormGroup = null;