BLD-1117: Add read-only list of Group Configurations.
Rename.
Add fixes.
Update advanced settings.
Update right column.
Tidy up the code.
update docstring for group_experiments_list_handler
Add bok-choy tests.
Merge branch 'anton/read-only-list-of-experiments' of https://github.com/edx/edx-platform into anton/read-only-list-of-experiments
remove if for the sake of simpler upstream review (we do not need json/html logic yet)
add test that group_experiments_list_handler responds with info on Course and user partitions
Add 2 more checks in test_view_index.