Release 2.6.0 (#4472)

- Added: calendar entry title combination for customer, project and activity
- Added: show not_invoiced and not_exported data in detail screens
- Added: force logout if user is disabled
- Added: reduced amount of database queries on several screens
- Fixed: open-close status on work-contract screen for users without configuration
- Fixed: failsafe order/orderBy in query if manually manipulated to be null
- Fixed: unify statistic calculation (not_invoiced and not_exported) across screens
- Tech: bump packages
- Tech: Symfony 6.4

composer.json

@@ -202,7 +202,7 @@
         "symfony": {
             "id": "01C3FWRDJJEX9K6Y3A4XDFXPBR",
             "allow-contrib": true,
-            "require": "6.3.*"
+            "require": "6.4.*"
         }
     }
 }