Audit use of ::loadUnchanged and any routes that might need to load the latest revision

Overview

@penyaskito pointed out that in a few places we're using EntityStorageInterface::loadUnchanged to compare auto-save values with the current entity.

However that disregards any forward drafts. We need to audit all usages and ascertain where it is not appropriate to ignore forward drafts.

Proposed resolution

Audit use of ::loadUnchanged and make sure its use is appropriate
Audit routes with an entity param and make sure they're loading the latest version if appropriate

User interface changes