Update suggest.min.js for [26333].

see #26110, #27599.
fixes #27621.
Built from https://develop.svn.wordpress.org/trunk@27911


git-svn-id: http://core.svn.wordpress.org/trunk@27742 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Widget Customizer: Don't use opacity for the update spinner.

`opacity` isn't supported in IE8 and makes the spinner always visible.

see #27485.
Built from https://develop.svn.wordpress.org/trunk@27912


git-svn-id: http://core.svn.wordpress.org/trunk@27743 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Widget Customizer: Restore deferral of `previewer-loading` class removal until preview is synced.

props westonruter.
fixes #27635.
Built from https://develop.svn.wordpress.org/trunk@27913


git-svn-id: http://core.svn.wordpress.org/trunk@27744 1a063a9b-81f0-0310-95a4-ce76da25c4cd