Translations updates - ja zh_CN

docs/manual/ja/images/bulk-rename.png

docs/manual/ja/images/file-manager-window.png

docs/manual/ja/images/file-properties.png

docs/manual/ja/images/preferences-advanced.png

docs/manual/ja/images/preferences-behavior.png

docs/manual/ja/images/preferences-side-pane.png

docs/manual/ja/images/preferences-views.png

docs/manual/ja/images/removable-drives-and-media.png

docs/manual/ja/images/sendto-menu.png

docs/manual/ja/images/visible-columns.png

po-doc/ChangeLog

po-doc/ja.po