Author: Shamim Rezaie
MDL-61132 Questions: Adapt logic on backup/restore
Modifying backup/restore to adapt with "Top" categories.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=8df402e4019724a6aeb555df6e6ae082b1af71ff
http://github.com/moodle/moodle/commit/8df402e4019724a6aeb555df6e6ae082b1af71ff
+ 3.5 en [restoremultipletopcats,core_question]