Update russian localization

[Externallex]

-Added translation of new strings;
-Fixed mistakes that distort the Russian language.
-Added translation of the 4 sections of the manual

[ThatGravyBoat]

I know it's a bit late but is it possible that you can update this to the new lang entries?

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}