[i18n] update json-files

[luclu]

Base language: English

• removes obsolete keys from translation files
• adds missing/not translated keys with values from the English base file to the translation files

Omited keys:

• mist.applicationMenu.view.languages
• mist.applicationMenu.view.langCodes

All files were linted.

Script available at https://gist.github.com/luclu/d95ce9fd3f070fc338248d1f8ea959a0

[mention-bot]

@luclu, thanks for your PR! By analyzing the history of the files in this pull request, we identified @christoph2806, @alexvandesande and @atomrigs to be potential reviewers.

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