Release 2.0.12 (#3947)

- added submenus in action drodowns, to shorten them
- show all user-edit-screens in action dropdown
- fix cascade delete teams through customer
- fix cascade delete customer/project/activity through teams
- fix responsive classes for "internal rate" column
- clarify error message if invoice number generator or calculator is missing

src/Voter/TimesheetVoter.php

@@ -128,7 +128,7 @@ final class TimesheetVoter extends Voter
         $permission .= '_';
 
         // extend me for "team" support later on
-        if ($subject->getUser()->getId() === $user->getId()) {
+        if ($subject->getUser()?->getId() === $user->getId()) {
             $permission .= 'own';
         } else {
             $permission .= 'other';