Fix：检查框内容无法顶端对齐的问题

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

@@ -49,8 +49,8 @@
                             <ColumnDefinition Width="Auto"/>
                             <ColumnDefinition Width="*"/>
                         </Grid.ColumnDefinitions>
-                        <Border Height="18" Width="18" x:Name="checkBoxBorder" Background="{TemplateBinding Background}" CornerRadius="2" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}"/>
-                        <hc:SimplePanel Grid.Column="0" Height="18" Width="18" x:Name="markGrid">
+                        <Border Height="18" Width="18"  VerticalAlignment="{TemplateBinding VerticalContentAlignment}" x:Name="checkBoxBorder" Background="{TemplateBinding Background}" CornerRadius="2" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}"/>
+                        <hc:SimplePanel Grid.Column="0" Height="18" Width="18" x:Name="markGrid" VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
                             <Path UseLayoutRounding="True" x:Name="path" StrokeDashOffset="8" StrokeDashArray="8,8" Width="12" Height="12" Data="{StaticResource CheckedGeometry}" StrokeThickness="2" Stretch="Uniform" Stroke="{DynamicResource TextIconBrush}"/>
                             <Rectangle x:Name="indeterminateMark" RadiusX="2" RadiusY="2" Fill="{DynamicResource PrimaryBrush}" Margin="2" Opacity="0"/>
                         </hc:SimplePanel>