Notification of string changes

CHAT, MDL-23374, fixed studentlogs option


http://github.com/moodle/moodle/commit/708c2e041af7873785465c5154c71e7a6c62e354

+ 2.0 en [nopermissiontoseethechatlog,mod_chat]
+ 2.0 en [studentseereports_help,mod_chat]