If current questionnaire is based on a public one, do not include survey nor questions in backup.

Signed-off-by: Joseph Rézeau <moodle@rezeau.org>
Issue relevant warnings for questionnaires dependent on Public questionnaire when Public has been deleted.

Signed-off-by: Joseph Rézeau <moodle@rezeau.org>
Updated releasenotes.txt

Signed-off-by: Joseph Rézeau <moodle@rezeau.org>
CONTRIB-4683 :: In MSSQL "user" is a keyword and therefore cannot be used as an alias.

Signed-off-by: Joseph Rézeau <moodle@rezeau.org>
CONTRIB-4699 :: No reason to automatically check N/A buttons if rate question is not required.

Signed-off-by: Joseph Rézeau <moodle@rezeau.org>