Hello,

Questionnaire is missing radar-chart and "feedback options" -menu completely.

Tested with Moodle 3.5 & mod_questionnaire 3.5.4 (Build - 2019032100) (2018050109) and Moodle 3.9 & mod_questionnaire 3.8.3 (Build - 2020062400) (2020011508)

Steps to repeat:

1. Create questionnaire with 3 radio buttion questions that are required to answer. You can use attached questionnaire for testing.
2. Open Feedback-tab
3. Select "feedback section"
4. Notice how chart types is missing "radar"
5. Open Advanced settings -page and notice how "feedback options" -menu is missing completely.