Media Modal: Restore to the previous filter and search error message.

fixes #28963.
Built from https://develop.svn.wordpress.org/trunk@29532


git-svn-id: http://core.svn.wordpress.org/trunk@29308 1a063a9b-81f0-0310-95a4-ce76da25c4cd
DFW: revert applying the Visual editor body color and background-color for now. Set the color to #333 and the background to transparent. Fixes #28330.
Built from https://develop.svn.wordpress.org/trunk@29533


git-svn-id: http://core.svn.wordpress.org/trunk@29309 1a063a9b-81f0-0310-95a4-ce76da25c4cd