hc:NumericUpDown support for Validation

src/Shared/HandyControl_Shared/Themes/Styles/Base/NumericUpDownBaseStyle.xaml

@@ -21,6 +21,7 @@
         <Setter Property="ScrollViewer.PanningMode" Value="VerticalFirst"/>
         <Setter Property="Stylus.IsFlicksEnabled" Value="False"/>
         <Setter Property="VerticalContentAlignment" Value="Center"/>
+        <Setter Property="Validation.ErrorTemplate" Value="{x:Null}"/>
         <Setter Property="Template">
             <Setter.Value>
                 <ControlTemplate TargetType="hc:NumericUpDown">
@@ -285,6 +286,7 @@
     </ControlTemplate>
 
     <Style x:Key="NumericUpDownPlusBaseStyle" BasedOn="{StaticResource NumericUpDownExtendBaseStyle}" TargetType="hc:NumericUpDown">
+        <Setter Property="IsError" Value="{Binding Path=(Validation.HasError),RelativeSource={RelativeSource Self}}"/>
         <Setter Property="Template" Value="{StaticResource NumericUpDownPlusTopTemplate}"/>
         <Style.Triggers>
             <Trigger Property="hc:InfoElement.TitlePlacement" Value="Left">