improved duration and minute selector (#2264)

* do not close modal if form is dirty
* deprecated TimesheetConfiguration
* inject timezone in form types
* cleanup usage of UserDateTimeFactory
* allow to configure increment steps for minutes
* use 15 minutes step for datetimepicker in project edit form
* use rounding rules for increments in minute select for begin and end
* allow duration in multi user and admin timesheet forms
* make dropdown values configurable

src/Event/ThemeJavascriptTranslationsEvent.php

@@ -48,6 +48,7 @@ final class ThemeJavascriptTranslationsEvent extends Event
         'confirm.delete' => ['confirm.delete', 'messages'],
         'delete' => ['action.delete', 'messages'],
         'login.required' => ['login_required', 'messages'],
+        'modal.dirty' => ['modal.dirty', 'messages']
     ];
 
     public function getTranslations(): array