Notification of string changes

Author: Adrian Greeve
MDL-62474 theme_boost: Update to provider and unit test.
Theme boost contains a user preference which was not reported
before. Unit tests have been added to test the update.


http://git.moodle.org/gw?p=moodle.git;a=commit;h=6acb8efc76ad53489be21bd5d452304b16784d42
http://github.com/moodle/moodle/commit/6acb8efc76ad53489be21bd5d452304b16784d42

+ 3.3 en [privacy:metadata:preference:draweropennav,theme_boost]
+ 3.3 en [privacy:drawernavclosed,theme_boost]
+ 3.3 en [privacy:drawernavopen,theme_boost]
- 3.3 en [privacy:request:preference:draweropennav,theme_boost]