Author: Ryan Wyllie
MDL-64821 mod_forum: add show/hide reply toggle for modern view
http://git.moodle.org/gw?p=moodle.git;a=commit;h=7902e4dc556665a39c2877b53655faa4822dbe72
http://github.com/moodle/moodle/commit/7902e4dc556665a39c2877b53655faa4822dbe72
+ 3.8 en [hidepreviousrepliescount,mod_forum]
+ 3.8 en [showpreviousrepliescount,mod_forum]