Improve gridsplitter UI more.

Author: Hosch250

RetailCoder.VBE/UI/Settings/IndenterSettings.xaml

@@ -179,14 +179,16 @@
             </StackPanel>
         </ScrollViewer>
 
+        <Border Grid.Row="1" BorderBrush="DarkGray" BorderThickness="1" />
         <GridSplitter Grid.Row="1"
                       Height="5"
                       ShowsPreview="False"
                       Cursor="SizeNS"
-                      HorizontalAlignment="Stretch"
                       Background="DarkGray"
                       BorderBrush="Transparent"
-                      BorderThickness="2" />
+                      BorderThickness="2"
+                      HorizontalAlignment="Stretch"
+                      Width="15" />
 
         <ScrollViewer Grid.Row="2"
                       VerticalScrollBarVisibility="Auto"