f544a4825d
Exposes the hide_from_toc xblock attribute so course authors can configure it as a section visibility option in Studio. Before this change, the Hide from TOC functionality was mainly used by OLX components. Hence, it wasn't available for configuration through the Studio UI. Still, its implementation existed in the platform and could be used by setting the attribute: hide_from_toc=true as part of the OLX definition. Ref: https://openedx.atlassian.net/wiki/spaces/OEPM/pages/3853975595/Feature+Enhancement+Proposal+Hide+Sections+from+course+outline