Add nav indicator to Tests nav link.
Remove nav indicator at test exam page so it doesn't point to the Practice nav link.
TODO: bootstrap css integration breaks the nav indicator and some input boxes.
TODO: Can select multiple exams to enable using the Enable Exam Mode button instead of just one active exam.
Bug fix for #2122 to toggle exam mode on a test and remove the display from the previous test.
Merge branch 'nalanda-rct2' into feature/2122-Exam-list-page
Merge branch 'nalanda-rct2' into feature/2122-Exam-list-page
Initial unit tests for `student_testing` app for the #2151 - Exam list page story.
Initial unit test to redirect student if exam mode is on based on browser post, tastypie api put call, or value was set at database.
Merge branch 'nalanda-rct2' into feature/2122-Exam-list-page
Some unit tests for exam page redirect of students if teacher enables exam mode.
Merge branch 'nalanda-rct2' into feature/2122-Exam-list-page
Refactor and add more unit tests for exam page feature.
Refactor exam unit tests and initial attempt to make some codes reusable.
Fix problem which raises exception when `python manage.py kaserve` is ran.
Refactor exam page tests to get the initial browser test working.
More browser tests for exam mode feature.
Refactor browser tests to cover generic browser button actions for exam mode feature.
Merge pull request #2151 from cpauya/feature/2122-Exam-list-page

Feature/2122 exam list page