When resetting the data of a given course via /course/reset.php, the information about which users have already viewed certain modules is not deleted. I.e. the data in course_modules_viewed is still present after reset.

This can result in weird behavior when requiring "viewing" of a certain activity for further progress, etc.

How to Reproduce:

1. Create a new course with a Page activity "one" that has completion tracking activated and is marked as completed on view. Create another activity "two" which can only be accessed if "one" is marked completed.
2. View the activity with a test user. Will show marked as completed successfully. "two" is accessible.
3. Reset course as admin
4. Check again with test user. Will show  Done: View for "one" but activity is not marked as completed, thus preventing progressing to next one ("two").