The 4.0 branch is 4.0.1-alpha.

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Plugin search: Wrap results in a form to fix pagination's `paged` input field.

Merges [29829] to the 4.0 branch.

props jesin, ocean90.
fixes #18724.

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Quicktags: move focusing the editor after inserting content to the end of the code blocks.

Merges [29884] to the 4.0 branch.

Fixes a bug in Chrome where both the textarea and the window may auto-scroll to unexpected position on clicking a Quicktags button.

props azaozz, avryl.
fixes #29944.

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Editor-expand: reset the editor height after the window is resized.

Merges [29886] to the 4.0 branch.

props azaozz.
fixes #29952.

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Upgrade MediaElement to 2.15.1.

Merges [29733] to the 4.0 branch.

Changes from 2.15.0:
https://github.com/johndyer/mediaelement/compare/2.15.0...2.15.1

Continues to revert upstream commit b7f82b4 to restore the status quo for Chromium support.

props wonderboymusic.
fixes #29620.

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