Update UserMenuBuilder to adjust menu labels and sort order

- Renamed 'My invitations list' to 'invite.list.title'.
- Updated the sort order for 'My calendar' from 9 to 8, to place "invitation list" just after the calendar list

src/Bundle/ChillCalendarBundle/Menu/UserMenuBuilder.php

@@ -27,10 +27,10 @@ class UserMenuBuilder implements LocalMenuBuilderInterface
                 'route' => 'chill_calendar_calendar_list_my',
             ])
                 ->setExtras([
-                    'order' => 9,
+                    'order' => 8,
                     'icon' => 'tasks',
                 ]);
-            $menu->addChild('My invitations list', [
+            $menu->addChild('invite.list.title', [
                 'route' => 'chill_calendar_invitations_list_my',
             ])
                 ->setExtras([