message: Remove Show and Hide commands from the context menu (win)
diff: <MenuItem Header="Stop" InputGestureText="Ctrl+S"
  Command="{x:Static toggl:KeyboardShortcuts.Stop}"/>
  <Separator Style="{StaticResource {x:Static MenuItem.SeparatorStyleKey}}"/>
  - <MenuItem Header="Show"
  - Command="{x:Static toggl:KeyboardShortcuts.Show}"
  - Visibility=
  - "{Binding Path=IsEnabled, RelativeSource={RelativeSource Self}, Mode=OneWay, Converter={StaticResource BooleanToVisibilityConverter}}"
  - />
  - <MenuItem Header="Hide" InputGestureText="Ctrl+W"
  - Command="{x:Static toggl:KeyboardShortcuts.Hide}"
  - Visibility=
  - "{Binding Path=IsEnabled, RelativeSource={RelativeSource Self}, Mode=OneWay, Converter={StaticResource BooleanToVisibilityConverter}}"
  - />
  - <Separator Style="{StaticResource {x:Static MenuItem.SeparatorStyleKey}}"/>
  <MenuItem Header="Sync" InputGestureText="F5"
  Command="{x:Static toggl:KeyboardShortcuts.Sync}"/>
  <MenuItem Header="Reports"
  