General: Backport several commits for release.

- Embeds: Ensure that the title attribute is set correctly on embeds.
- Editor: Prevent HTML decoding on by setting the proper editor context.
- Formatting: Ensure that wp_validate_redirect() sanitizes a wider variety of characters.
- Themes: Ensure a broken theme name is returned properly.
- Administration: Add a new filter to extend set-screen-option.
Merges [47947-47951] to the 4.3 branch.
Props xknown, sstoqnov, vortfu, SergeyBiryukov, whyisjake.


git-svn-id: https://develop.svn.wordpress.org/branches/4.3@47971 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Jake Spurlock 2020-06-10 18:36:32 +00:00
parent 11d47be9d9
commit d2a1b90537

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