Success Message for Account Activation for logged out users.

common/djangoapps/student/tests/test_activate_account.py

common/djangoapps/student/views.py

common/test/acceptance/pages/lms/login_and_register.py

lms/djangoapps/student_account/views.py

lms/static/js/student_account/views/AccessView.js

lms/static/js/student_account/views/LoginView.js

lms/static/sass/multicourse/_dashboard.scss

lms/static/sass/views/_login-register.scss

lms/templates/student_account/form_status.underscore