Author: Huong Nguyen
MDL-72603 timeline: Lazy loading for timeline block
Replace timeline block pagination with "Show more activities" lazy loading
http://git.moodle.org/gw?p=moodle.git;a=commit;h=c2979ff1cca85803ec8614ff146512f8313eefd3
http://github.com/moodle/moodle/commit/c2979ff1cca85803ec8614ff146512f8313eefd3
+ 4.0 en [moreactivities,block_timeline]
+ 4.0 en [morecourses,block_timeline]