[BUGFIX] Compare feature is broken

Adding users to Compare list does not work.

Change-Id: I079f0c8cf47213854c1ef358631b6a7c9ecc9260
Resolves: #41233
Releases: 6.0
Reviewed-on: http://review.typo3.org/15377
Reviewed-by: Mattias Nilsson
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters

typo3/sysext/beuser/Classes/Controller/BackendUserController.php

@@ -167,6 +167,7 @@ class BackendUserController extends \TYPO3\CMS\Extbase\Mvc\Controller\ActionCont
 	 */
 	public function addToCompareListAction($uid) {
 		$this->moduleData->attachUidCompareUser($uid);
+		$this->moduleDataStorageService->persistModuleData($this->moduleData);
 		$this->forward('index');
 	}
 
@@ -178,6 +179,7 @@ class BackendUserController extends \TYPO3\CMS\Extbase\Mvc\Controller\ActionCont
 	 */
 	public function removeFromCompareListAction($uid) {
 		$this->moduleData->detachUidCompareUser($uid);
+		$this->moduleDataStorageService->persistModuleData($this->moduleData);
 		$this->forward('index');
 	}