sites_content_overrides 1.0.0-beta2

Second beta, built against sites 1.0.0-beta2. Run the updates (drush updb) after upgrading.

• Override routes answer one access question: the per-site override capability on the route's site, and the content must be viewable; the site-scoped twin of the "Manage overrides" tab is gone.
• The override form has one way of showing fields a site cannot override: hidden, or read-only ("same on all sites"); the setting that let them stay editable is removed by an update.
• A site's override routes are served on its own host or the hub only; the override operation shows only where its target opens.
• Preview of each site's version of a node; the served revision index; the resolver's latch against the origin site's override revision is gone (storage no longer produces it).
• Top bar sorts the page actions by side (own version / original); Paragraphs and behaviors in overrides; "Own version" wording.