Russian locale update. Little grammar mistakes were edited. Some text was paraphrased. Some missing fields were added.
Correct version (+ tabs were removed).
Fix Tabbing in Themes Dialog
Add missing ellipsis in View > Themes
Merge pull request #8388 from le717/issue-8385

Add missing ellipsis in View > Themes
Correct LANGUAGE_SYSTEM_DEFAULT translation.
Merge pull request #8387 from SAPlayer/themes-dialog-tabbing

Fix Tabbing in Themes Dialog
Merge pull request #8371 from gthacoder/release

Russian Locale Update
Merge remote-tracking branch 'upstream/master'