Update DatePicker selects on init (#27)

Prevents the visible datepicker input to be filled but the hidden ones sent to the server being empty, potentially resulting in confusing validation errors

Author: benediktveith

webroot/js/app/components/DatePicker.js

@@ -73,6 +73,9 @@ App.Components.DatePickerComponent = Frontend.Component.extend({
                 }
             }.bind(this));
 
+            // Initially update selects
+            this._updateSelects($($selectContainer).parents('.form-group'), $picker.data('DateTimePicker').getMoment(), $picker);
+
             $container.data('datePickerApplied', true);
         }.bind(this));
     },