Added Russian localization (Thanks mouse166)

FossilOrigin-Name: eb4cdf56ed9074850e909a18946a5f7c4c42707e

src/MainWindow.cpp

@@ -1986,6 +1986,7 @@ void MainWindow::on_actionAbout_triggered()
 							"stayawake (German de_DE)\n"
 							"djnavas (Spanish es_ES)\n"
 							"Fringale (French fr_FR)\n"
+							"mouse166 (Russian ru_RU)\n"
 					   );
 }