Apply style changes to hidden items
Merge pull request #1114 from shield-9/hidden-sharing-style

Sharing: Apply style changes to hidden items
REST API: remove unneeded pre-theme-loading functionality, was used to work around Twenty Eleven being the active theme.

See #3046..

Merges r104816-wpcom.
REST API

When loading the theme context (functions.php - so we get CPTS, etc), also load the Jetpack compat files.
Adds tests to test the functionality of getting iS settings (usually stored in the jetpack.php file).

Merges r104920-wpcom.
REST API

Load the new post formats endpoints and provide some tests to make sure they work as expected.
see [104371] and [104372]
https://github.com/Automattic/beep-beep-boop/issues/48

Merges r104373-wpcom.
REST API

Mark the post formats endpoint as undocumented for now

Merges r104390-wpcom.
REST API: Add support for "auto-draft" post status

This adds support for auto-drafts, which are temporary
placeholders created under the hood when the new post
page is loaded up, reserving a post ID so that e.g.
embed/shortcode previewing works.

Merges r104664-wpcom.
REST API: when parsing the args in the taxonomy endpoint, remove the `fields` arg as it's used for output filtering on the final output and not as part of the args used to fetch the categories themselves

Merges r104968-wpcom.
REST API: Allow clearing of tags or categories by sending empty field value

Previously, an empty field value would be ignored. This uses the behavior of assigning the default category if one is not set.

See: https://github.com/Automattic/beep-beep-boop/issues/90

Merges r104849-wpcom.
Open graph: allow the featured image to be used for the `og:image` tag

Merges r104874-wpcom.
Media Summary/Enhanced excerpt: set defaults for the number of max characters and max words so that they can be overidden on a case by case basis.

This will be used to fix the incorrect count sometimes generated in Facebook publicize messages.

Merges r104815-wpcom.
SSO: Don't add our button on the pw reset page

If they've clicked on the 'Lost Password' link, don't add our button to
the page.
SSO: Code style nitpicks.
Instead of checking $_GET, let's check the global.

Basing it off of
https://github.com/WordPress/WordPress/blob/36a1e543d6e172f1ae4daca2da3e
360fdece8e56/wp-login.php#L406-L414

Also some minor restructuring.