This issue is part of the course hierarchy project.

Issue goals

• The current activity chooser uses section numbers to decide where to create the activity. The component must be adapted to use section IDs.
• Change the activity creation form to the section ID instead of the section number. Internally, the course modules table stores the section ID, so the change will only affect the PHP classes.

Future issues

The delegates section won't have a unique section number. We need the activity chooser to use section Ids to create activities into delegated sections.

Method deprecation

This issue will involve deprecating several methods. The details can be found in the Course hierarchy deprecation plan documented here:

https://docs.google.com/document/d/1o-QGQBfHEkkz4-yKDYO-m3EfFKGFImsRcX2VITtkjck/edit#heading=h.li4vjh4w91tf