title: Extending extension with new actions
body: <p>I'm migrating from 6.2 to 7.6 and I'm struggling with an extension(A) that extends another extension (b) that extends News (A-->B-->News).  Everything is OK in 6.2 but not in 7.6.</p>
  
  <p>I'm calling my action from Typoscript (lib.news.nextEvent)</p>
  
  <pre><code>lib.news.nextEvent &lt; .related
  nextEvent  {
      switchableControllerActions {
            News {
              1 = nextEventList
            }
      }
  
      settings {
          startingpoint = 123
          limit = 15
  
      link {
              skipControllerAndAction = 1
          }
      }
  }
  </code></pre>
  
  <p>I have this error</p>
  
  <pre><code>Oops, an error occurred! Code: 201812181555070cca4167 - {"exception":"exception 'TYPO3\\CMS\\Extbase\\Mvc\\Exception\\NoSuchActionException' with message 'An action \"nextEventListAction\" does not exist in controller \"Roquin\\RoqNewsevent\\Controller\\EventController\"
  </code></pre>
  
  <p>TypoScript\setup.txt</p>
  
  <pre><code>config.tx_extbase {
      objects {
          Roquin\RoqNewsevent\Controller\EventController {
              className = QcMedia\QmNewsExtended\Controller\NewsExtendedController
          }
      }
  }
  </code></pre>
  
  <p>In my controller i have (not the full actual class)</p>
  
  <pre><code>NewsExtendedController.php
  
  use Roquin\RoqNewsevent\Controller\EventController;
  
  class NewsExtendedController extends EventController
  
  public function nextEventListAction(array $overwriteDemand = NULL)
  </code></pre>
  
  <p>Can someone give me a hint about that error?
  Thanks</p>