Notification of string changes

Author: David Mudrak
Fixed portfolio UI integration in forum thread
There was not enough space to put yet another discussion thread control
widget.


http://git.moodle.org/gw?p=moodle.git;a=commit;h=f357d2f8eb91bbb90a01127f514b468c24632120
http://github.com/moodle/moodle/commit/f357d2f8eb91bbb90a01127f514b468c24632120

+ 2.0 en [exportdiscussion,mod_forum]