forgot to update the datepicker format string in a couple of places

src/Umbraco.Web.UI.Client/src/views/propertyeditors/datepicker/datepicker.controller.js

@@ -29,7 +29,7 @@ function dateTimePickerController($scope, notificationsService, assetsService, a
         angularHelper.safeApply($scope, function() {
             // when a date is changed, update the model
             if (e.localDate) {
-                if ($scope.model.config.format == "yyyy-MM-dd hh:mm:ss") {
+                if ($scope.model.config.format == "YYYY-MM-DD HH:mm:ss") {
                     $scope.model.value = e.localDate.toIsoDateTimeString();
                 }
                 else {

src/Umbraco.Web/PropertyEditors/DateTimePropertyEditor.cs

@@ -12,9 +12,7 @@ namespace Umbraco.Web.PropertyEditors
         {
             _defaultPreVals = new Dictionary<string, object>
                 {
-                    //NOTE: This is very important that we do not use .Net format's there, this format
-                    // is the correct format for the JS picker we are using so you cannot capitalize the HH, they need to be 'hh'
-                    {"format", "yyyy-MM-dd hh:mm:ss"}
+                    {"format", "YYYY-MM-DD HH:mm:ss"}
                 };
         }