Release 2.0.26 (#4087)

- setting "rounding days" not required
- developer: added user pref for public holiday group (to be used by plugins)
- developer: added WorkingTimeYearEvent (to be used by plugins)
- user pref: cleanup work contract form and support more fields (to be used by plugins)
- code cleanup
- bump theme and composer packages

src/Controller/ProfileController.php

@@ -271,9 +271,9 @@ final class ProfileController extends AbstractController
         // prepare ordered preferences
         $sections = [];
 
-        /** @var \ArrayIterator $iterator */
+        /** @var \ArrayIterator<int, UserPreference> $iterator */
         $iterator = $profile->getPreferences()->getIterator();
-        $iterator->uasort(function (UserPreference $a, UserPreference $b) {
+        $iterator->uasort(function ($a, $b) {
             return ($a->getOrder() < $b->getOrder()) ? -1 : 1;
         });