dont register personal files_external setting if it's empty

Author: icewind1991

apps/files_external/lib/AppInfo/Application.php

@@ -68,7 +68,14 @@ public function __construct(array $urlParams = array()) {
 	 * Register settings templates
 	 */
 	public function registerSettings() {
-		\OCP\App::registerPersonal('files_external', 'personal');
+		$container = $this->getContainer();
+		$backendService = $container->query('OCA\\Files_External\\Service\\BackendService');
+
+		/** @var \OCA\Files_External\Service\UserGlobalStoragesService $userGlobalStoragesService */
+		$userGlobalStoragesService = $container->query('OCA\Files_External\Service\UserGlobalStoragesService');
+		if (count($userGlobalStoragesService->getStorages()) > 0 || $backendService->isUserMountingAllowed()) {
+			\OCP\App::registerPersonal('files_external', 'personal');
+		}
 	}
 
 	/**