CLC-4577 - Restored original E-Grades link logic. window.ENV.COURSE_ROOT_URL does not exist in Gradebook context
CLC-4568 - Added 'Download E-Grades (.csv)' header to grading scheme dialogue view. Applied Foundation styling to container
Merge pull request #3180 from redconfetti/CLC-4577-fix-undefined

CLC-4577 - Resolve issue with E-Grades link in Gradebook