Editor: fix switching Text to Visual and back if TinyMCE fails to initialise, fixes #23235

git-svn-id: http://core.svn.wordpress.org/trunk@23790 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Compress scripts/styles: 3.6-alpha-23791.

git-svn-id: http://core.svn.wordpress.org/trunk@23791 1a063a9b-81f0-0310-95a4-ce76da25c4cd