Bug 1:
@amyehodge has found a problem with attached files that I think is related to initially saving a draft with neither Yes/No select.

1. Edit a deposited work
2. Don't select Yes or No. Save the draft
3. Edit it again and select Yes. Add a file.
4. HB error: https://app.honeybadger.io/projects/55564/faults/100610329

I am not sure yet of the source of the error, but I think it has to do with the use_previous_attached_files method in the base_work_form.rb and it attaching (empty?) files that are empty when checksummed later.

I am not sure why we removed logic to require users to select Yes/No even when creating a draft. It seems like that would be good to do anyway, to avoid having a nil new_user_version param saving nil user_version numbers into the work_version.

Bug 2
If you don't select Yes/No, save the draft, and then re-open the draft, the previous version's version description is getting displayed:

I made a change in the last commit to require users to select Yes/No for a new version even in draft mode. Forcing a selection seems to prevent the bugs above, pending further testing in QA. The styling could use a tweak (see below) to be bolder.

If this does not match with the desired UX, we will need to find a different solution.