Updates to the 'Log out everywhere' implementation.
 * Include a message and a disabled button when you're only logged in at one location.
 * Avoid leaking the session token in HTML.
 * Simplify, simplify, simplify.

see #30264.

Built from https://develop.svn.wordpress.org/trunk@30888


git-svn-id: http://core.svn.wordpress.org/trunk@30878 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Update/add plugin recommendation strings.

Update [30887], add a translation function to the Vine string.

fixes #30337. see #30435.

Built from https://develop.svn.wordpress.org/trunk@30889


git-svn-id: http://core.svn.wordpress.org/trunk@30879 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Call it 'Distraction-free writing mode' and update the help string. fixes #30657.

Built from https://develop.svn.wordpress.org/trunk@30890


git-svn-id: http://core.svn.wordpress.org/trunk@30880 1a063a9b-81f0-0310-95a4-ce76da25c4cd