[LyX/master] More updates from Yuriy

[Richard Kimberly Heck]

commit 1ea2e250c3b5158cfaa0a6b6501a735859d57c2f
Author: Richard Kimberly Heck <rikiheck at lyx.org>
Date:   Thu Oct 10 17:42:55 2019 -0400

    More updates from Yuriy

 lib/doc/ru/Intro.lyx    |  238 ++++++++------------
 lib/doc/ru/Tutorial.lyx |  245 ++++++---------------
 po/ru.gmo               |  Bin 643077 -> 726665 bytes
 po/ru.po                |  568 ++++++++++++++++++++++++++++-------------------
 4 files changed, 499 insertions(+), 552 deletions(-)