Pontoon: Update Japanese (ja) localization of Thimble
Pontoon: Update Japanese (ja) localization of Thimble

Localization authors:
- marsf <chimantaea_mirabilis@yahoo.co.jp>

humphd/thimble.mozilla.org,mozilla/thimble.mozilla.org,humphd/thimble.mozilla.org,mozilla/thimble.mozilla.org,mozilla/thimble.mozilla.org,mozilla/thimble.mozilla.org,humphd/thimble.mozilla.org,humphd/thimble.mozilla.org