message: Tweak the margin so that scrollbar does not look on top of border shadows (win)
diff: <Setter Property="OverridesDefaultStyle" Value="true"/>
  <Setter Property="Width" Value="4"/>
  <Setter Property="Height" Value="Auto" />
  - <Setter Property="Margin" Value="0 0 2 0" />
  + <Setter Property="Margin" Value="-1 1 1 1" />
  <Setter Property="Template" Value="{StaticResource Toggl.VerticalScrollBar}" />
  <Style.Triggers>
  <Trigger Property="Orientation" Value="Horizontal">
  <Setter Property="Height" Value="4" />
  <Setter Property="Width" Value="Auto" />
  + <Setter Property="Margin" Value="1 -1 1 1" />
  <Setter Property="Template" Value="{StaticResource Toggl.HorizontalScrollBar}" />
  </Trigger>
  </Style.Triggers>
  