[5.x] Don’t save fields with save set to false

[edalzell]

Need to re-open #336.

New use case is that I need a field to be not saved and editable in the CP. Using visibility:computed means that the field is not editable in the CP.

[edalzell]

Still need to update the tests as they reference don't_save which is not the correct config field handle

[duncanmcclean]

Still need to update the tests as they reference don't_save which is not the correct config field handle

Do you? dont_save is just the handle of the field in the blueprint we're using for testing. The setting itself is called save. I think it's fine to leave it how it is at the moment.

[github-actions]

Released as part of v5.4.0.