Questions can be edited.
Minor - removing var_dump.
Fixing weird bug in the exercise result.
Improving "try once" feature.
Merge branch '1.9.x' of github.com:beeznest/chamilo-lms-icpna into icpna19
Merge branch '1.9.x' of https://github.com/beeznest/chamilo-lms-icpna into 1.9.x