A lot of text translated and improved
In a few days I will translate this again looking for errors and some things I missed.
Enjoy!

Currently translated at 82.4% (855 of 1037 strings)

Co-authored-by: Lurkki14 <jussi.kuokkanen@protonmail.com>
Translate-URL: https://weblate.nheko.im/projects/nheko/nheko-master/fi/
Translation: Nheko/nheko

fixes #1590

Not just when any setting is modified...

fixes #1563

fixes #1560

fixes #1561

fixes #1600