fixes #7838

closes #7909

closes #7868

Facebook removed the API and facebook integration is broken now, so lets
remove it.

closes #7874

Fixes #7852

closes #7853

Fixes #7854

closes #7839

closes #7833

Previous file history in 80dfdcd6, couldn't keep it.

LinksController redirects requests for provided diaspora:// links to
respective entities urls.

This is required to make url_for(StatusMessage.new) work

fixes #7770

closes #7774

closes #7814

When public fetch is requested with Poll guid, return parent
StatusMessage for it, which includes the Poll in its turn.

closes #7815

I missed it in #7803

closes #7807

Use completed_at datetime field as an indication of a performed migration

closes #7805

Adds support for merging accounts with account migration by eliminating
duplicate data in favor of the target user's data.

closes #7803

closes #7791

closes #7778

closes #7772

Some podmins were confuse how they can disable this redirect and I think
the rule with two users can actually be a little confusing. I think the
main goal of this page to give the podmin a little start and I think
after they configured everything, the pod works and they found the link
to the wiki to make themself an admin, it is OK to remove the redirect.

Also it's bad for single-user pods where this page always stays active,
even if they are an admin, but have only one user. It's more useful for
single-user pods to have the login on the home page.

closes #7783

Fixes #6564.

closes #7775

closes #7769

This feature only worked on the same pod and was more confusing than
useful.

fixes #3862

closes #7742

This is needed to properly initialize Handlebars partials without
a document ready handler.

fixes #7739

closes #7740

fixes #7377

fixes #7736

closes #7737

If a user scrolls just below the 1000px threshold and clicks the back-to-top button within 250ms, we'll never hide the button as the scroll event gets throttled away. That's rather inconvenient.

closes #7729

fixes #7727

closes #7724

When there were posts with many followed tags they were returned
multiple times, resulting in less than 15 unique posts. That resulted in
some posts to be missed in the stream.

Fixes #4503

closes #7715

We only return `nil` when we know the person, but don't know the key or
the key is invalid, so it doesn't make sense to retry in this case. When
the person isn't known and can't be fetched we raise a DiscoveryError
which will be retried.

Also the errors were moved to the `Signable` module in the last release.

closes #7717

closes #7721

Use markdown-it-html5-embed plugin so user can embed audio and
video using the markdown link syntax []() in the HTML5 way.

fixes #7700
closes #7706