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

tests/Mocks/RoundingServiceFactory.php

@@ -9,7 +9,7 @@
 
 namespace App\Tests\Mocks;
 
-use App\Configuration\TimesheetConfiguration;
+use App\Configuration\SystemConfiguration;
 use App\Tests\Configuration\TestConfigLoader;
 use App\Timesheet\Rounding\CeilRounding;
 use App\Timesheet\Rounding\ClosestRounding;
@@ -35,8 +35,8 @@ class RoundingServiceFactory extends AbstractMockFactory
             ];
         }
 
-        $configuration = new TimesheetConfiguration($loader, [
-            'rounding' => $rules
+        $configuration = new SystemConfiguration($loader, [
+            'timesheet' => ['rounding' => $rules]
         ]);
 
         $modes = [