pidgin/nest

Revamp internationalization section

2021-07-16, Sorvival
cd4a05f44d0a
Revamp internationalization section

- Adapt the contents of the tips for i18n page into the main
internationalization one.
- Change reference from tipsfortranslators to the internationalization page in
the about->supported languages page.

Testing Done:
Ran `dev-server.sh` and verified content looks as intended.

Bugs closed: NEST-33

Reviewed at https://reviews.imfreedom.org/r/807/
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