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/Controller/InvoiceController.php

@@ -408,6 +408,7 @@ final class InvoiceController extends AbstractController
             'action' => $this->generateUrl('invoice', []),
             'method' => 'GET',
             'include_user' => $this->isGranted('view_other_timesheet'),
+            'timezone' => $this->getDateTimeFactory()->getTimezone()->getName(),
             'attr' => [
                 'id' => 'invoice-print-form'
             ],