message: Tweak tag item display (win)
diff: </Border>
  </DataTemplate>
  <DataTemplate x:Key="tag-item-template">
  - <Border Height="32" Margin="12 0 0 0">
  + <Border Height="32" Padding="12 0 0 0">
  + <Border.Style>
  + <Style TargetType="Border">
  + <Setter Property="Background" Value="Transparent" />
  + <Style.Triggers>
  + <DataTrigger Binding="{Binding IsChecked}" Value="True">
  + <Setter Property="Background">
  + <Setter.Value>
  + <SolidColorBrush Color="{StaticResource Toggl.AccentColor}" Opacity="0.1" />
  + </Setter.Value>
  + </Setter>
  + </DataTrigger>
  + </Style.Triggers>
  + </Style>
  + </Border.Style>
  <CheckBox VerticalAlignment="Center"
  Content="{Binding Text}"
  ToolTip="{Binding Text}"
  