Plugin details:

Prevent plugins with long names from looking bad and breaking layouts.

props stephdau. fixes #28883.

Built from https://develop.svn.wordpress.org/trunk@29605


git-svn-id: http://core.svn.wordpress.org/trunk@29379 1a063a9b-81f0-0310-95a4-ce76da25c4cd
TinyMCE wpView: exclude more non-printable keyCodes in isSpecialKey(), fixes #29115
Built from https://develop.svn.wordpress.org/trunk@29606


git-svn-id: http://core.svn.wordpress.org/trunk@29380 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media:

* Make attachment focus styles more obvious, particularly for already selected items.
* Fix styling for the selection set attachments.
* Remove some CSS cruft.

fixes #28822.

Built from https://develop.svn.wordpress.org/trunk@29607


git-svn-id: http://core.svn.wordpress.org/trunk@29381 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Better visual focus syling in customizer, theme preview, and attachment details modals.

props celloexpressions.
fixes #29147.

Built from https://develop.svn.wordpress.org/trunk@29608


git-svn-id: http://core.svn.wordpress.org/trunk@29382 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media modal: fix the progress bar in the attachment thumbnail. Props gcorne, fixes #29367
Built from https://develop.svn.wordpress.org/trunk@29609


git-svn-id: http://core.svn.wordpress.org/trunk@29383 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Customizer panels: use a single back button for all panels.

This also ensures the back button is visible on iOS devices.

props celloexpressions.
fixes #29135.

Built from https://develop.svn.wordpress.org/trunk@29610


git-svn-id: http://core.svn.wordpress.org/trunk@29384 1a063a9b-81f0-0310-95a4-ce76da25c4cd