Notification of string changes

Author: Dan Poltawski
MDL-32508 course/formats: Respect single page course display mode
Topics and weeks have been converted to use a shared renderer to output
their content.

Note, I started with good intentions but this renderer has mixed
paradgims due to fast and cheap winning out on the trinity.

AMOS BEGIN
MOV [currenttopic,access],[currentsection,format_topics]
MOV [currentweek,access],[currentsection,format_weeks]
AMOS END


http://git.moodle.org/gw?p=moodle.git;a=commit;h=1804b7c1bc99667198d865b56a5af3158d532de5
http://github.com/moodle/moodle/commit/1804b7c1bc99667198d865b56a5af3158d532de5

+ 2.3 en [currentsection,format_topics]
+ 2.3 en [currentsection,format_weeks]
- 2.3 en [currenttopic,core_access]
- 2.3 en [currentweek,core_access]