[LyX/2.3.x] Update it.po

[Enrico Forestieri]

commit 9963cc2ef57bfe63eadc1f146e9523a40c2acd4e
Author: Enrico Forestieri <for...@lyx.org>
Date:   Sat Aug 4 15:47:33 2018 +0200

    Update it.po

 po/it.gmo |  Bin 529920 -> 531451 bytes
 po/it.po  | 1236 ++++++++++++++++++++++++++++---------------------------------
 2 files changed, 560 insertions(+), 676 deletions(-)