fix integration, register new type converters

Author: ChrisPulman

integrationtests/IntegrationTests.iOS/LoginViewController.designer.cs

@@ -27,6 +27,8 @@ public void Register(Action<Func<object>, Type> registerFunction)
             registerFunction(() => new ActivationForViewFetcher(), typeof(IActivationForViewFetcher));
             registerFunction(() => new DependencyObjectObservableForProperty(), typeof(ICreatesObservableForProperty));
             registerFunction(() => new BooleanToVisibilityTypeConverter(), typeof(IBindingTypeConverter));
+            registerFunction(() => new DoubleToStringTypeConverter(), typeof(IBindingTypeConverter));
+            registerFunction(() => new DecimalToStringTypeConverter(), typeof(IBindingTypeConverter));
             registerFunction(() => new AutoDataTemplateBindingHook(), typeof(IPropertyBindingHook));
 
             if (!ModeDetector.InUnitTestRunner())