Add new DiscussionInlineView which uses DiscussionThreadListView

common/lib/xmodule/xmodule/js/src/discussion/display.coffee

common/static/common/js/discussion/discussion_module_view.js

...atic/common/js/discussion/views/discussion_inline_view.js

.../common/templates/discussion/inline-discussion.underscore

...djangoapps/teams/static/teams/js/views/team_discussion.js

lms/static/lms/js/build.js

lms/static/lms/js/spec/main.js

lms/static/sass/discussion/_discussion.scss

lms/static/sass/discussion/elements/_navigation.scss

lms/templates/discussion/_discussion_inline.html

lms/templates/discussion/_js_body_dependencies.html

lms/templates/discussion/_thread_list_template.html