[LyX/master] Mark pieces of text as French + typos in fr.po

[jpc]

commit db20196d30b4306866251de18532d917a7024712
Author: jpc <jpc at lyx.org>
Date:   Tue Jun 1 18:33:35 2021 +0200

               Mark pieces of text as French + typos in fr.po

 lib/doc/fr/Customization.lyx | 3474 +++---------------------------------------
 po/fr.gmo                    |  Bin 623072 -> 623073 bytes
 po/fr.po                     |    6 +-
 3 files changed, 211 insertions(+), 3269 deletions(-)