default value for billable flag and support in batch update (#2851)

src/Controller/SystemConfigurationController.php

@@ -382,6 +382,10 @@ final class SystemConfigurationController extends AbstractController
                         ->setConstraints([
                             new GreaterThanOrEqual(['value' => 0])
                         ]),
+                    (new Configuration())
+                        ->setName('defaults.timesheet.billable')
+                        ->setType(YesNoType::class)
+                        ->setOptions(['help' => 'default_value_new', 'label' => 'label.billable']),
                 ]),
             (new SystemConfigurationModel())
                 ->setSection(SystemConfigurationModel::SECTION_LOCKDOWN)