* introduce json-files for translations to structure data and add ability using translation managements
* Translated using Weblate (Italian)
Currently translated at 40.1% (342 of 852 strings)
Translation: test/mailcow
Translate-URL: http://192.168.178.22:8080/projects/test/mailcow/it/
* Translated using Weblate (Catalan)
Currently translated at 58.3% (497 of 852 strings)
Translation: test/mailcow
Translate-URL: http://192.168.178.22:8080/projects/test/mailcow/ca/
* Translated using Weblate (Polish)
Currently translated at 45.3% (386 of 852 strings)
Translation: test/mailcow
Translate-URL: http://192.168.178.22:8080/projects/test/mailcow/pl/
* Translated using Weblate (Latvian)
Currently translated at 59.0% (503 of 852 strings)
Translation: test/mailcow
Translate-URL: http://192.168.178.22:8080/projects/test/mailcow/lv/
* Translated using Weblate (Portuguese)
Currently translated at 27.5% (234 of 852 strings)
Translation: test/mailcow
Translate-URL: http://192.168.178.22:8080/projects/test/mailcow/pt/
* Translated using Weblate (Russian)
Currently translated at 45.4% (387 of 852 strings)
Translation: test/mailcow
Translate-URL: http://192.168.178.22:8080/projects/test/mailcow/ru/
* Translated using Weblate (German)
Currently translated at 99.9% (851 of 852 strings)
Translation: test/mailcow
Translate-URL: http://192.168.178.22:8080/projects/test/mailcow/de/
* removed empty and unused text user_change_fn
* removed empty and unused text user_change_fn II
