TinyMCE: back-compat, refresh and re-enable the 'wpdialogs' plugin, and mark...

TinyMCE: back-compat, refresh and re-enable the 'wpdialogs' plugin, and mark it as deprecated. See #24067.
Built from https://develop.svn.wordpress.org/trunk@26899


git-svn-id: https://core.svn.wordpress.org/trunk@26782 1a063a9b-81f0-0310-95a4-ce76da25c4cd