Allowing metadata editing for draft codelists on OpenCodelists

On OpenCodelists it is now possible to edit the metadata for a codelist during the draft phase.

An important part of the metadata for a codelist is explaining why certain searches were made, and why codes were included or excluded. Previously you could only add or edit metadata when a codelist was ready for review. However, by this point users may have forgotten the decisions they made during the creation process. Now there is a metadata tab to allow key things to be recorded during the creation of a codelist:

This change came about from direct user feedback. If you see anything with any OpenSAFELY product that you think could be improved, please let us know!

• Pull request: opensafely-core/opencodelists#2630