Implement editing from the Studio container page.

CHANGELOG.rst

...ontentstore/features/component_settings_editor_helpers.py

cms/djangoapps/contentstore/features/pages.py

cms/djangoapps/contentstore/features/transcripts.py

cms/djangoapps/contentstore/features/video-editor.py

cms/djangoapps/contentstore/views/component.py

cms/djangoapps/contentstore/views/item.py

cms/djangoapps/contentstore/views/preview.py

cms/djangoapps/contentstore/views/tests/test_container.py

cms/static/coffee/spec/main.coffee

cms/static/coffee/spec/main_spec.coffee

cms/static/coffee/spec/models/section_spec.coffee

cms/static/coffee/spec/views/assets_spec.coffee

cms/static/coffee/spec/views/course_info_spec.coffee

cms/static/coffee/spec/views/module_edit_spec.coffee

cms/static/coffee/spec/views/overview_spec.coffee

cms/static/coffee/spec/views/section_spec.coffee

cms/static/coffee/spec/views/textbook_spec.coffee

cms/static/coffee/spec/views/upload_spec.coffee

cms/static/coffee/src/views/module_edit.coffee