added radio input fields to pre-requisite selection

Initial changes to gate section based on completion percentage

code refactoring and added evaluation of completion milestone

Fixed broken unit tests and added new tests

Fixed broken tests and quality violations

Fixed Pep8 violation

Fixed eslint quality violations

Test changes as suggested by reviewer

changes after feedbacy from reviewer

Update the docstring with suggested changes

excluding chapter from the blocks

Disallow empty values for min score and min completion

Changes afte feedback from UX/Accessibility

removed blank line