When using routing in apps, no apps are loaded in the left navigation tree. To fix this: load apps for matching a request

lib/base.php

@@ -488,6 +488,7 @@ class OC{
 			return;
 		}
 		try {
+			OC_App::loadApps();
 			OC::getRouter()->match(OC_Request::getPathInfo());
 			return;
 		} catch (Symfony\Component\Routing\Exception\ResourceNotFoundException $e) {