DateTimeUpDown: added support for custom context menu

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/CalculatorUpDown/Themes/Generic.xaml

@@ -82,6 +82,7 @@
                                          AllowSpin="{TemplateBinding AllowSpin}" ShowButtonSpinner="{TemplateBinding ShowButtonSpinner}">
                                 <local:WatermarkTextBox x:Name="TextBox" BorderThickness="0" 
                                                         Background="{TemplateBinding Background}"
+                                                        ContextMenu="{TemplateBinding ContextMenu}"
                                                         FontFamily="{TemplateBinding FontFamily}" 
                                                         FontSize="{TemplateBinding FontSize}" 
                                                         FontStretch="{TemplateBinding FontStretch}"

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/DateTimeUpDown/Themes/Generic.xaml

@@ -28,6 +28,7 @@
                                          AllowSpin="{TemplateBinding AllowSpin}" ShowButtonSpinner="{TemplateBinding ShowButtonSpinner}">
                         <local:WatermarkTextBox x:Name="TextBox" BorderThickness="0" 
                                                 Background="{TemplateBinding Background}"
+                                                ContextMenu="{TemplateBinding ContextMenu}"
                                                 FontFamily="{TemplateBinding FontFamily}" 
                                                 FontSize="{TemplateBinding FontSize}" 
                                                 FontStretch="{TemplateBinding FontStretch}"

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Themes/Generic.xaml

@@ -24,6 +24,7 @@
                                          AllowSpin="{Binding AllowSpin, RelativeSource={RelativeSource TemplatedParent}}" ShowButtonSpinner="{Binding ShowButtonSpinner, RelativeSource={RelativeSource TemplatedParent}}">
                         <local:WatermarkTextBox x:Name="TextBox" BorderThickness="0" 
                                                 Background="{TemplateBinding Background}"
+                                                ContextMenu="{TemplateBinding ContextMenu}"
                                                 FontFamily="{TemplateBinding FontFamily}" 
                                                 FontSize="{TemplateBinding FontSize}" 
                                                 FontStretch="{TemplateBinding FontStretch}"

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/TimePicker/Themes/Generic.xaml

@@ -102,6 +102,7 @@
                                     <ColumnDefinition Width="Auto" />
                                 </Grid.ColumnDefinitions>
                                 <local:DateTimeUpDown x:Name="PART_TimeUpDown" BorderThickness="1,1,0,1"  
+                                                      ContextMenu="{TemplateBinding ContextMenu}"
                                                       AllowSpin="{TemplateBinding AllowSpin}"
                                                       Format="{TemplateBinding Format, Converter={StaticResource TimeFormatToDateTimeFormatConverter}}"
                                                       FormatString="{TemplateBinding FormatString}"