message: Get rid of AllowsTransparency for performance reasons (win)
diff: </DataTemplate>
  </Setter.Value>
  </Setter>
  - <Setter Property="AllowsTransparency" Value="True" />
  <Setter Property="Background" Value="{DynamicResource Toggl.Background}" />
  <Setter Property="ShowMaxRestoreButton" Value="False" />
  <Setter Property="ShowIconOnTitleBar" Value="False" />
  