* Switch from auth.loginUser to User.loginPasswordUser with Promise
* Remove a cascade of unused views that were using auth.loginUser: StudentLogInModal, StudentSignupModal, HourOfCodeView
* Also remove auth.createUser
Use selected hero in Course mode play
Show selected hero on Courses (in progress)
Add hero select modal
Use short names, only show warriors
Use box-shadow instead of borders
Add tests for HeroSelectModal
Refactor modal opening test
Address code review feedback
Hide TeachersContactModal after sending message
Fix GET /db/level/:handle/session, more extensively test
Fix EnrollmentView number of students input to stop losing focus on input
Fix EnrollmentsView syntax
Fix ActivateLicensesModal "Get Enrollments" button when already in the enrollments page
Update EnrollmentsView with new credit numbers when ActivateLicensesModal closes
Hide search box in TeacherClassView "Enrollment Status" tab
Tweak EnrollmentsView styling
Fix EnrollmentsView tests
Fix AnalyticsView
Make EnrollmentsView more explicitly handle undefined and empty array prepaid groups
Remove log
CoursesView handles JoinClassModal cancel
Re-enable EditStudentModal set password button when the form changes
Fix course instance tests, next level endpoint bug
Fix EditStudentModal tests
* Refactor several related endpoints and views
* Redesign EnrollmentView, add TeacherContactModal
* Add "Enrollment Status" tab to TeacherClassView
* Delete PurchaseCoursesView and related files
* Style-flatten RemoveStudentModal
* Fix error handling in ActivateLicensesModal
* TeacherCoursesView loads faster by only loading course campaigns, and not load prepaids
