0c61b0d4e2
If the library content block is already in the course, then don't refresh the children when we re-import it. This lets us address TNL-7507 (Randomized Content Block Settings Lost in Course Import) while still avoiding AA-310, where the IDs of the children for an existing library_content block might be altered, losing student user state. When importing, we only copy the default values from content in a library the first time that library_content block is created. Future imports ignore what's in the library so as not to disrupt course state. You can still update to the library via the Studio UI for updating to the latest version of a library for this block.
CMS (Content Management System) ------------------------------- This directory contains code relating to the course management portal for edX, also known as Studio.