MDL-65518 badges: some language improvements
Helen has suggested some wording changes to make easier to understand
some of the backpack settings.
Thanks a lot Helen!!
http://git.moodle.org/gw?p=moodle.git;a=commit;h=c9e526a4e79a0fc43fa63e2a0ddbd949b8af9094
http://github.com/moodle/moodle/commit/c9e526a4e79a0fc43fa63e2a0ddbd949b8af9094
+ 3.7 en [allowexternalbackpack,core_badges]
+ 3.7 en [allowexternalbackpack_desc,core_badges]
+ 3.7 en [sitebackpack_help,core_badges]