Optimized (a lot) how we deal with user, groups and topics in API #610
Removed unused bundle variable setting
Commented timer starting in get_groups, should fix build
Added get_topic method to TopicCachier class & implemented it in GroupResource #610
Removed DebugToolbar from settings
No need to remove debug_toolbar from settings_tests.INSTALLED_APPS (already removed)
Fixed 500 on individual
Added empty dataset fixture
empty input when the user has been invited to the topic
create /topic/<id>/collaborators API endpoint
can retrieve collaborators from Topic service
resolve collaborators in invite ctrl
start collaborators list
collaborators list
can make someone leave a topic
link trash icon to delete function in collaborators link
update collaborators list on addition/deletion
owner always on top
check authorization before update collaborators list
create an administrator group on topic creation