change -修改左边选择框，点击某一个颜色就加深，方便客户知道当前所处的页面

src/Khd.Core.Wpf/Form/FormBoardT.xaml

@@ -110,15 +110,25 @@
             </Style>
             <Style TargetType="TabItem" x:Key="DefaultItem">
                 <Setter Property="Background" Value="#213269"/>
-                <!--设置背景色-->
+                <Setter Property="Foreground" Value="White"/>
+                <Setter Property="BorderBrush" Value="#213269"/>
                 <Setter Property="Template">
                     <Setter.Value>
                         <ControlTemplate TargetType="TabItem">
-                            <Grid>
+                            <Border x:Name="Border" 
-                                <Border Background="{TemplateBinding Background}" BorderThickness="1"  BorderBrush="#213269">
+                                    Background="{TemplateBinding Background}"
-                                    <ContentPresenter ContentSource="Header" VerticalAlignment="Center" HorizontalAlignment="Center"/>
+                                    BorderBrush="{TemplateBinding BorderBrush}" 
-                                </Border>
+                                    BorderThickness="1">
-                            </Grid>
+                                <ContentPresenter x:Name="ContentSite"
+                                                ContentSource="Header"
+                                                HorizontalAlignment="Center"
+                                                VerticalAlignment="Center"/>
+                            </Border>
+                            <ControlTemplate.Triggers>
+                                <Trigger Property="IsSelected" Value="True">
+                                    <Setter TargetName="Border" Property="Background" Value="#172557"/>
+                                </Trigger>
+                            </ControlTemplate.Triggers>
                         </ControlTemplate>
                     </Setter.Value>
                 </Setter>