Author: Dongsheng Cai
MDL-24917, display activity backup area in restore-pre ui
http://git.moodle.org/gw?p=moodle.git;a=commit;h=d0da42d1b763b77b61631b59985b44865486c857
http://github.com/moodle/moodle/commit/d0da42d1b763b77b61631b59985b44865486c857
+ 2.0 en [choosefilefromcoursebackup,core_backup]
+ 2.0 en [choosefilefromuserbackup,core_backup]
+ 2.0 en [choosefilefromactivitybackup,core_backup]
+ 2.0 en [choosefilefromactivitybackup_help,core_backup]