updated swedish language strings

[artingu]

#241

If you need Spanish and current translator goes missing put me down. Thanks for ots, brilliant stuff.

[Luzifer]

Thanks for updating the translations! There are still a few missing:

INFO[0000] validating language...                        lang=sv
WARN[0000] missing translation                           lang=sv translation_key=alert-insecure-environment
WARN[0000] missing translation                           lang=sv translation_key=btn-theme-switcher-auto
WARN[0000] missing translation                           lang=sv translation_key=text-secret-burned
WARN[0000] missing translation                           lang=sv translation_key=tooltip-burn-secret

Regarding the Spanish translations: Feel free to add yourself to the translators list for Spanish and add those translations! There are also several seven translations missing; it would be great to have that complete again.