Optimized performance

HandyControlDemo/Window/AboutWindow.xaml

@@ -10,22 +10,17 @@
                  ShowTitle="True"
                  BorderThickness="1"
                  BorderBrush="#262e2f"
-                 NonClientAreaBackground="White"
-                 NonClientAreaForeground="{StaticResource PrimaryTextBrush}"
-                 CloseButtonForeground="{StaticResource PrimaryTextBrush}"
-                 OtherButtonForeground="{StaticResource PrimaryTextBrush}"
-                 OtherButtonHoverBackground="#e5e5e5"
                  Style="{StaticResource WindowWin10}"
                  ResizeMode="NoResize"
                  ShowInTaskbar="False"
                  WindowStartupLocation="CenterOwner"
                  Width="340"
                  Height="220">
-    <Grid>
+    <controls:SimplePanel>
         <StackPanel HorizontalAlignment="Center" VerticalAlignment="Top" Margin="0,30,0,0">
             <TextBlock Text="HandyControl" FontSize="30" Foreground="{StaticResource PrimaryBrush}" VerticalAlignment="Top" HorizontalAlignment="Center"/>
             <TextBlock Text="{Binding Version}" HorizontalAlignment="Center" Margin="0,10,0,0" Foreground="{StaticResource PrimaryBrush}"/>
         </StackPanel>
         <TextBlock Text="{Binding CopyRight}" HorizontalAlignment="Center" VerticalAlignment="Bottom" Margin="0,0,0,14" Foreground="{StaticResource ThirdlyTextBrush}"/>
-    </Grid>
+    </controls:SimplePanel>
 </controls:Window>

HandyControlDemo/Window/NoNonClientAreaDragableWindow.xaml

@@ -14,11 +14,11 @@
                      Title="NoClientDragableWindow" 
                      Height="450" 
                      Width="800">
-    <Grid>
+    <controls:SimplePanel>
         <Rectangle VerticalAlignment="Top" Margin="10" Height="30" RadiusX="4" RadiusY="4" Stroke="{DynamicResource BorderBrush}" StrokeDashArray="2,2"/>
         <Border controls:WindowAttach.IsDragElement="True" VerticalAlignment="Top" Margin="11" Height="28" Background="{DynamicResource DarkDefaultBrush}" CornerRadius="4">
             <TextBlock Text="{x:Static langs:Lang.DragHere}" Style="{StaticResource TextBlockDefault}"/>
         </Border>
         <Button Click="ButtonClose_OnClick" HorizontalAlignment="Right" Margin="0,15,15,0" VerticalAlignment="Top" Padding="0" Height="20" Width="20" Style="{StaticResource ButtonPrimary}" controls:IconElement.Geometry="{StaticResource CloseGeometry}" controls:BorderElement.CornerRadius="15"/>
-    </Grid>
+    </controls:SimplePanel>
 </controls:BlurWindow>