Update Japanese translation.

[Akihiro Sagawa]

On Mon, 2 Oct 2017 07:43:23 +0000, Hugh McMaster wrote:
> > "Are you sure you want to delete this registry key and all of its subkeys?"
> > -msgstr "本当にレジストリ キー '%1' とそのサブキーを削除しますか?"
> > +msgstr "本当にこのレジストリ キー '%1' とそのサブキーすべてを削除しますか?"
> 
> You left the '%1' in the updated string.

Hi Hugh,
Thanks for pointing this out. I'll send revised version.

Akihiro Sagawa