Prevent Action class config ending up as action link attributes.

Before this fix keys like "viewVar", "findMethod" etc. set for Action class config,
and key "callback" ended up as HTML attributes for action links in templates.

src/Listener/ViewListener.php

@@ -448,7 +448,7 @@ protected function _getControllerActionConfiguration($actionName, $config)
             'method' => $method,
             'options' => array_diff_key(
                 $config,
-                array_flip(['method', 'scope', 'className', 'link_title', 'messages', 'url', 'scaffold'])
+                array_flip(['method', 'scope', 'link_title', 'url', 'scaffold', 'callback'])
             )
         ];
         if (!empty($config['callback'])) {
@@ -467,7 +467,7 @@ protected function _getAllowedActions()
     {
         $actions = $this->_action()->getConfig('scaffold.actions');
         if ($actions === null) {
-            $actions = $this->_crud()->getConfig('actions');
+            $actions = array_keys($this->_crud()->getConfig('actions'));
         }
 
         $extraActions = $this->_action()->getConfig('scaffold.extra_actions') ?: [];