Fixing $token in mystudents.php -refs #6930
Indentation
Merge remote branch 'upstream/1.9.x' into 1.9.x
Merge pull request #209 from ycastillo/yoselyn.6930

Yoselyn.6930
Minor - adding lang var
Merge branch '1.9.x' of ssh://github.com/chamilo/chamilo-lms into chamilo19
updating modernizr
Minor - format code.
Fixing html error form.
Fixing mp3 player see BT#6613
Updating sql file.
Fixing comment file manage see BT#6418
Adding "HereIsYourFeedback" lang if there's no comment see BT#6418
Merge remote branch 'upstream/1.9.x' into 1.9.x
Minor updating lang var.
Minor - fixing PHP warnings.
Add filed Description in MultipleAnswer Excel test import
Minor - fixing PHP warnings.
Minor comment improvement
Minor