Enabling anonymous surveys -refs #6829
Protecting survey preview page -refs #6829
Protecting survey preview page -refs #6829
Protecting survey preview page
Indentation
security added
code conventions
Minor - format code.
Minor - format code.
Cleaning code.
Fixing typo.
Fixing dropbox download see BT#7680
Replacing global calls and use functions see BT#7682
Fixing PHP warnings.
Minor - format code.
The session ends the end_date at 23.59.59 see BT#7740
Minor - fixing PHP warning.
Adding 23:59:59 as  end_date limit see BT#7740
Fixing wrong label.
Fixing label bis.