Previously blocks contained a range of versions to indicate which versions of an add-on were blocked, so it was easily to tell if all versions for that guid would be blocked (0 to *); now blocks have a finite and defined list of versions that are blocked which is less straightforward if you want to know "is every version for this add-on blocked, or just some of them".

So we should add a is_all_versions property to the Block serializer which will answer that question.

┆Issue is synchronized with this Jira Task