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/DependencyInjection/Configuration.php

@@ -94,6 +94,32 @@ class Configuration implements ConfigurationInterface
                 ->booleanNode('markdown_content')
                     ->defaultValue(false)
                 ->end()
+                ->scalarNode('duration_increment')
+                    ->defaultNull()
+                    ->validate()
+                        ->ifTrue(function ($value) {
+                            if ($value !== null) {
+                                return ((int) $value) < 0;
+                            }
+
+                            return false;
+                        })
+                        ->thenInvalid('Duration increment is invalid')
+                    ->end()
+                ->end()
+                ->scalarNode('time_increment')
+                    ->defaultNull()
+                    ->validate()
+                        ->ifTrue(function ($value) {
+                            if ($value !== null) {
+                                return ((int) $value) < 1;
+                            }
+
+                            return false;
+                        })
+                        ->thenInvalid('Time increment is invalid')
+                    ->end()
+                ->end()
                 ->arrayNode('rounding')
                     ->requiresAtLeastOneElement()
                     ->useAttributeAsKey('key')