add FocusVisualStyle for some controls

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

@@ -15,6 +15,19 @@
         <Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
         <Setter Property="Padding" Value="16"/>
         <Setter Property="BorderThickness" Value="1"/>
+        <Setter Property="FocusVisualStyle">
+            <Setter.Value>
+                <Style>
+                    <Setter Property="Control.Template">
+                        <Setter.Value>
+                            <ControlTemplate>
+                                <Rectangle Margin="-2" Opacity=".6" SnapsToDevicePixels="true" Stroke="{DynamicResource SecondaryBorderBrush}" StrokeThickness="2" StrokeDashArray="1 1" RadiusX="25" RadiusY="25"/>
+                            </ControlTemplate>
+                        </Setter.Value>
+                    </Setter>
+                </Style>
+            </Setter.Value>
+        </Setter>
         <Style.Triggers>
             <Trigger Property="IsMouseOver" Value="True">
                 <Setter Property="Background" Value="{DynamicResource DarkDefaultBrush}"/>